LC85632

LC85632 SANYO | Alldatasheet

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Overview Package Dimensions The LC85632 is a multi-function digital clock IC unit: mm that in addition to providing current time display p|p-30S-D supports a wide range of functions, including an alarm function, a sleep function, a calendar » ‘6 function, and a function to turn connected a <—— equipment on and off. Furthermore, the LC85632 22 provides a simpler user interface than that of Ly iad earlier Sanyo products. —P 27.2 Applications ry + Alarm clocks 3 * Clock radios ” Bb 0.48 95 . : DIP-3OS-D Functions sane * Current time display + Two independent alarm functions with snooze function Pin Assignment + Sleep timer function (up to 90 minutes) + Calendar function One year calendar (January 1 to December 31) that can display leap year’s day (February 29). aw a Put] [30]vop 10’ SHRag & d[ 2} [29]RT-T1ME SET/DIMNER 10°SHRD & e[ 3} [28]woDE SELECT 10'SHRe & HRe[ 4} [27]50/60Hz iNPUT HRb Ag [25]WANUAL & SLEEP HRe & d[ 6} [25]ALW-A/B DISP & SEL HRa & f [24]JALu~B OUTPUT 10'swIN a & [8] [23]ALW-A OUTPUT 10°SWIK b & gL 9] [22}Rap10 OUTPUT 10'SWIK c & [10] [ZiJcat visP & SNOOZE 10'SWINe & kINe [11] [20}tiwe SET INPUT win b & g[i2| [19]cr osc winc & [13] [18}rest wine 8 ¢ [14] [17]vss coon [15] [16JaLw INDICATOR SANYO Electric Co., Ltd. Semiconductor Business Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110:}APAN 71093IN B8-0531 No. 4659-1/32

1 AM & PM ° LED output pins

2 | 10SHRag a ° [No.[__Pin__ TT Orve phase 1 | Ove phase 2] 3. | 10SHRb&e ° voo | (1 [awsem Tam few [2 -}osHRaged —|osHRed |rosHAg | f | wesHne ape |e [3 frostAe se IosHne ~fivsHap | 5 | HRDEG ° [a foshresHRe [HRe __[10SHRe _| 6 | HAcad o| [S[HRbag [Hag [HAD _| 7 | HReet ° [es [Read [Had [HRe | [7 [HRaai— Hat [Waa | 8 | 1OSMINO Bt ° Le [resunaaT —esmira — |e —| 9 | 1OSMIN bBo ° [8 [osMinb&g [oSMND [10SMiNg | 10 | 10SMINc &d ° [ao frosmNc&a — [fosMiNe _[10SMING | 11 | 10'SMINe&MINe | 0 [11 [10'SMiNe & MiNe [[MINe [T0'SMINe [MIND&g [MiNg _[MiNB | 12 | MINDAG ° Hs ues — {wns — [ans —J 13 | MINC&d ° [14 [wiNaet [Mint [MiNa | 14 | mivaat ° [15 [COLON [coun [=| 15 | COLON ° [16 [ALMINDICATOR [[ALM-A ALM-B

16 ALM INDICATOR ie] (VDD ~ 15 V breakdown voltage)

RADIO OUTPUT Outputs a DC voltage. This pin is controlled by the inputs to the MANUAL & SLEEP pin (pin 26). it operates as a toggle. vpp During normal operation it outputs a low tevel (high impedance). MANUAL & SLEEP pin input level 4 DD OPEN, vss : ' RADIO OUT pin output level (when polled down to VSS) VSS: (Normal breakdown voltage) ALM-A OUTPUT Output alarm signals ALM-B OUTPUT ALM-A OUTPUT: Alarm A VDD ALM-B OUTPUT: Alarm B The output waveform is shown below, During normal operation these pins output a low level 4 {high impedance). ALM-A OUTPUT and ALM-B OUTPUT pin output levels (Summary diagram) ‘* ALM-A OUTPUT (2400 Hz) vss 1 *ALM-B OUTPUT (1200 Hz) ve UUW VSS : Output stat (Normal breakdown voltage) Continued on next page. No, 4659-232

Continued from preceding page. circuit TIME SET INPUT Input pin that starts the setting/update of the current time, veo the alarm time, or the calendar date. Normally left open (NOP). x The application of a high level is taken as a + input, which increases the value of the setting, and a low is taken as a~ input, which decreases the value of the setting. L

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‘ipa 21 | CALDISP& Input pin for calendar display and snooze, SNOOZE vo Normally left open, When a high level is applied the calendar displays the day and month, and when a low level is applied tha calendar displays the month and day 5. However, if an alarm signal is being output from either ALM-A OUTPUT or ALM-B OUTPUT (pin 23 or 24) the L calendar is not displayed, but rather a snooze operation is started. 1H rs re penens ‘ALM-AVB DISP & SEL «= * pa ™** 1 tnput pin for switching between alarm mode and current time mode. Normally left open. Whan a high level is applied, the current time setting for alarm A is displayed, and when a low level is applied, the current time setting for alarm B is displayed. in either case, the time setting and the operation enable/disable state can be changed. MANUAL & SLEEP Input pin for setting the RADIO OUTPUT pin (pin 22) output | Open control and the sleep function time. Normally left open. When a high level is applied the RADIO OUTPUT goes high. This pin can also be used for setting the sleep function time, When a tow level is applied the RADIO OUTPUT goes low, When either a low level or a high level is applied, any alarm output in progress will be stopped. Continued on next page. No. 4659-332

Continued from preceding page. Intemal equivalent MODE SELECT Input pin for switching the operating mode, Either left open, connected ‘Switches the display mode and the clock input to the to VDD, or connected 10 vo 50/60 Hz INPUT pin (pin 27), ground. : High: 50 Hz/24 hour display G Open: 60 H2/12 hour display Low: 50 Hz/12 hour display a RT-TIME - input pin tor switching the enabled/disabied state for setting SET/DIMMER weg aenos | the time. & amatos | Normally eft open. High: Current time display/current time setting mode Open; Current time display/current time setting disabled Low: Dimmed display/curcant time setting disabled CROSC Connection pin for external AC circuit, Connected to VOD yoo ‘An oscillator circuit with a frequency of 4800 Hz can be 4h formed using the following R and C values. i R=68kQ i ’ C = 4700 pF ql 17, | vss Power supply pins. 30 | vob VSS =0V VDD = +5 V (standard) TEST LSI test pin, woo Normally left open. x 1. Hupp aeons 1: Borate ‘opa. 27 | 50/60 He INPUT Input pin for the 50/60 Hz input for the clock. > (Schmitt inputy Note: + SI" is an abbreviation for “three value input pin.” The inputs to these pins can be either high, open, or low. These pins are left open during normal use. + NOP: “No operation” No, 4659-4732

Three Value Input Circults: H: High level, M: Open, L: Low level, NOP: No operation + MODE SELECT [tnt tavet eg po so tizeenourdisplay pO cater hour eeplay + TIME SET INPUT 0 | CN a a GO + RE-TIME SET/DIMMER [rr tevet eg po current cisplayop * CAL DISP & SNOOZE a [oT atencar csp (day-montnycaendar setingisneoze on | Po current tine aepiaynop + ALM-A/B DISP & SEL fur tevet ogg po aia soning csplayisoring Po currence aspiaynop + MANUAL & SLEEP a po einpuseepin pL carrenttinecispiaytop + TEST 0 | po Tora operation No. 4659-5/32

——— CF Specifications Absolute Maximum Ratings at Ta = 25°C, VSS =0 V [——Paraneier_[Syrtet_[ —spcbio pin [Conon rang a) Waximam power suppyvolage | VODmax| Si SSS 0 0 Input voltage VIN() [All input pins other than the =03 to VDD +03 : 50/60 Hz INPUT pin vin(2) | 50/60 Hz INPUT =0.3 to VDD + 0.3 With a 100 kQ currentiimiting | VDD~12to VDD + 12 resistor inserted in the input, at that resistor’s terminal. lnput clamping current 50/60 Hz INPUT With a 100 kA limiting resistor | 0.4 10 +0.4 inserted in the input. wouTey | GROSE [S—=*d a VOD oa Output voltage vouT(2) | RADIO OUTPUT -03 0 VOD +03 Vv ALM-A OUTPUT ALM-B OUTPUT Output voltage VOUT(3) | LED SEGMENT output pins VOD ~ 1510 VDD +03 Vv (pins 1 to 16) Total output current EILED | Total for the LED The average vatue of the =280 100 SEGMENT output pins effective current value within (pins 1 to 16) a single display cycle according to the 50 or 60 Hz trequency. Ambientiemperature: operating | Tepr [| =8010 470 Allowable Operating Ranges at Ta = -30 to +70°C, VSS = 0 V Parameter Applicable pin Condition ee ae Operating powar supplyvotage [7 voo [Pf so feof vt Input high level voltage vin) | CROSC o7voof ss || ~———svooy,sv_sé'| Input high level voltage VIH(2) | TIME SET INPUT The intermediate isthe | VDD-05 vop] Vv CAL DISP & SNOOZE | open pin state ALM-A/B DISP & SEL | The rated values apply = intermediate level volta VIM) 12 VDD -0.5 vop +05, Vv MODE SELECT is applied. Input low level voltage ViL@)_| AT-TIME SETDIMMER vss) vss+05] V TEST Input high level voltage vinia) | 50/60 Hz INPUT [_vop-0s} | voD+0s Input low level voltage VIL(3) [vss] —s«{-=—«vD-30, Operating requency [top | sowone input Pa e00o fe | Tattle [| anes vaetnputpne| to ee No. 4659-6/32

—S— SSS Electrical Characteristics at Ta = 25°C, VDD =5 V, VSS=0V Output high tevel current TOH(1) | 10°SHRag &d ‘Output on, VOUT = VDD -2.0V Output off leakage current (OF (1) Output off, pA VOUT = VOD - 12 Output high level current AM & PM Output on, mA 10'SHRb & VOUT = VDD-2.0V 10'SHRe & HRe HRb &g HAc & d HRa &f 10'SMINa &f 10'SMIN b & 9 10'SMINc &d 10'SMINe & MINe MIN b &g MINC &d MINa at Output off leakage current COLON Output off, pA ALM INDICATOR VOUT = VDD- 12V ‘Output high level current 1OH(3)_ | RADIO OUTPUT Output on, ‘ALM-A OUTPUT VOUT = VDD -2.0V ‘Output off leakage current 10F(3)_| ALM-B OUTPUT Output off, pA VOUT = VSS Input high level current uH(2)_| CR OSC VIN = VDD re ee Input low level current uL2) VIN = VSS ee ae | Input high level current Hi) | TIME SET INPUT VIN= VDD pA CAL DISP & SNOOZE ALM-A/B DISP & SEL MANUAL & SLEEP Input low level current ™@) | Move SELECT VIN = VSS yA RT-TIME SET/DIMMER TEST Puil-up resistance RPU | TIME SET INPUT VIN = 1/2 VDD CAL DISP & SNOOZE ALM-A/B DISP & SEL MANUAL & SLEEP Pull-down resistance MODE SELECT RT-TIME SET/DIMMER TEST Cra sabi [1s [ca 050 Wee) | wo=8Bv es a ee Oscillator precision | ta _| CR OSC Nowe 2) VOD = 50V a ee ee Oscillator frequency tose | CROs Reorknsi% 4800 C= 3300 pF 25% Inital reset power supply voltage | VDET | VDD Power supply voltage Vv vss range when initial reset operates. Note: 1. In addition to not exceeding the ‘otal output currant ZILED (‘rom the absolute maximum ratings table), the segment output currents are allowed the foliowing values within a 700 mW total power dissipation range. 10’SHRag & d: Up to ~78 mA Others: Up to -39 mA Current flowing out of the IC is expressed with negative values, and current flowing into the IC is expressed with positive values. 2. The total variation in the oscillator frequency will be the sum of the precision and the stability. That is, the limiting values for the oscillator frequency variation fall within the range from losc - 19% to fose + 21%. No, 4659-7/32

LC85632 ' —eSSSSSSSSSSSSSSSSsSSSSSSSSSSSSSSSSSSSee Oscillator Circuit A 4800 Hz oscillator can be constructed by connecting a resistor and a capacitor to the CR OSC pin (pin 19). This oscillator is used as the internal clock for detecting the loss of external power, for alarm tones, and for the dimmer duty cycle, Therefore, it operates continuously during normal operation. In this section, we describe the operation when the AC input to the 50/60 Hz INPUT pin falls below 1 Hz. During a power outage, LED segment output from pins 1] to 16 is stopped. Also when power is restored and the AC input becomes over 1 Hz, the whole LED display (except for the alarm indicator) flashes. The period of this flashing is 1 Hz. This period is created by dividing the period of the AC input from the 50/60 Hz either by 50 when the clock is operated at 50 Hz, i.e., when either a low or high level is applied to the MODE SELECT pin, or by 60 when the clock is operated at 60 Hz, i.e., when the MODE SELECT pin is left open. Apply either a high level or a low level to the TIME SET INPUT pin to stop the flashing. In either case the flashing will stop and the chip will return to normal operation, ie., current time display. Tie the CR OSC pin high if the oscillator circuit is not used. In this case the IC will not detect power loss. Also, the alarm function will not operate correctly, but will output either no signal or an irregular signal. Furthermore, no segment signals will be output in dimmer mode. Note that if an oscillator circuit is not used, the high level applied to the CR OSC pin must be applied before power is applied. If the oscillator is forcibly stopped by applying a high level in the state where the CR oscillator is operating after power has been applied the alarm DC output may operate incorrectly. Dual Alarms This IC provides two 24-hour alarms systems, each of which can be set in 1 minute increments. Alarm A outputs a 2400 Hz alarm tone, and alarm B a 1200 Hz tone. (See the “Alarm” section for details on the alarm waveforms.) The. alarm tones are output continuously for 59 minutes, but can be interrupted for 6 to 7 minutes by the snooze function. Calendar This IC includes an on-chip full-year month and day display calendar function. The display can be switched to be either a month/day or a day/month format. The calendar function can be set to display leap year’s day (February 29) on what would have been March 1 by applying a low level to the TIME SET INPUT pin. Sleep Function This IC includes a 90 minute sleep circuit (off timer) that can be set easily. The sleep function time setting can be set to be 90, 60 , 45, 30, or 15 minutes in an “easy set” format. See No. 4659-12/32

oo SSSseeesesSeSsSsSSssSsSSSSSSSSSssSSSSSSSSSSSSSssSe Operating State Transition Diagram Initialization processing Current time display and setting mode Alarm display and Manual and sleep Calendar and snooze setting mode mode mode Figure 6 Operating State Transitions 1: Overall SSeS No. 4659-13/32

2 H 12.00 (Phase D) i 2 i} [AtMp[— H 5 : ‘Depends on the display ‘ ¢ ! mode : EF) Application of a i : z£ high orlow level | : + tothe ALM-A/B i) [SlBEP_[Notsx H E DISP & SEL pin. ‘|_[SNoozE [Nose | \\ : s { | Note: ‘The clock operates even in Application of a high level to the : 2 H this state. RT-TIME SET/DIMMER pin. H

2 Application of & high or low level to i

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3 Hy ‘Application of a high level = H

FS i) [auseno[— ec st i 8 : DIMMER pi [MeN [Reaves | 2 : [Pascoe rend | 3 i] [ALARM [No change : § high orlow level | {| [SNOOZE Making the RT-TIME SET/ | [SNOOZE [No change | } 3 & SNOOZE pin : ei ete H

2 H H

3 : When alarm operation is not enabled i e De eee eee eee eee een enn e cee e een e cence een teen ne sence eee eeneeeneenneceed : \\puconotangnmer | [Sn | [Eipkede ter and |} : Application of a high level =inp :

3 H to the RT-TIME SET/ [Coton [Fishing |

s i TAMPM DIMMER pin. JALM IND | Lit for enabled alarms] ¢ B Application of « t MEP ‘ sy high or low level : Normal clock AMP | display mode H 8 {] [AtarM [sa] Linked to the +and | | a to the MANUAL, ‘) teuegp Treva Linked » H g , i] [SLEEP [Nose H | \\_*stzerem | i] [snooze MekingieRT-TiMEsery | ALARM [Nochange 1 3 + Note: ©The indicators for DIMMER pin open [SLEEP [No change |} E i[er"Eedatemicem | PAMERASR | oor [Ness |} £ : ‘Note: Alam operation starts at ‘ o Hi the point the time matches |! 3 i an alarm setting time. H ec H When alarm operation is enabled Hl Note: The “Display” sections indicates the states of the LED display. Abbreviations: ALM IND. ~» Alarm indicator, AM/PM > AM, PM. Figure 7 Operating State Transitions 2: Current Time Display and Setting Block No. 4659-14/32

From initial state @ Application of a high or ow level to the ALM-A/B. DISP & SEL pin, thus selecting the alarm display : and setting mode. { [Sire Tiida state @ : ! H [Aum | : H : : H : Either A or B flashing| { : ods on th i i | [ALARM i i | [snooze [— | Apptication of a H 3 {Note Ifthe current me display is high or low level Hi 3 : Mashing, ther flashing is to the TIME SET H 2 : Sopp INPUT pin. : E : ; zg } [Swe [Alar time suing [Sue [Alam time setting] | > : : a i H By | Appticaion ots highor \\ Coton —| evi : { Vostro” | [Ceton__[Fashing ‘g| | lowleveliotte ALM-AB \\ {| [ALMIND| Eider A orB Mashing) Applica : 2| [ore scipa ms || TT ee nea 2] | cclecingtheatarm display / + |_[AMPM [Bepenireate | hahorlow evel : 1 | [ALARM [Operation enabled | Opera i 8 | | ARR operation enabled i € ik [ssooze [— i i 1 [Roter Making the TIME 5 —Ajsan onipar nana IP ! - = i open. setting time. : : Application of a low : “ H level to the MANUAL/ : 3 H SLEEP pin. t Fy { [Site Tala operation diab] : & : i g i | [Colon [Flashing | i

5 Clearing alarm displ H :

waning alarm display | : & (Making the ALM-A/B | + display mode : zg {| [suger [= } E i | [snooze [= i a { [Note: Inthe alarm not sat mode, the ‘ Ps H alarm will not operate even if t s : the set time is the same as the ; ° : current time. H & H ‘ The following are the alarm stop conditions during output. « An OFF input (pin 22 = VSS) + An ON input (pin 22 = VDD) + Arrival at the point 59 minutes following start of alarm output. * A snooze input (pin 21 = VDD or VSS) (Alarm output restarts after the completion of the snooze operation.) * The start of another alarm operation during alarm operation. Figure 8 Operating State Transitions 3: Alarm Display and Setting Block No. 4659-15/32

m From initial state ©

2 Application of a high or

2 Jow level to the CAL DISP

e=| & SNOOZE pin in the E inital state (1) state, hus 2 displaying the calendar. e i i i {| [Numbers [11 H BZ] [Apalicstion ofa high i | [eston “Tom ; S| [orto level ome cae I H El Pinconancctim 2: lame for H By {state in which no alarm : M : | |signalis being output [Operation i a ! H Fy i | [Sueep H = i H i t [Note: Application of a i i t high or low level : ; to the TIME SET } : INPUT pin. 3 = | [Sine Testender dispiey [Sue [Calendarsening |

2 Making he CAL i i

3 DISP& SNOOZE | ‘Nambers :

8 pin open. H —> = inputs. ‘ Apptiewion ot” | [esion for z 1 | [ALMIND[Enbictsimem | Nphortowiect | IncwIND;Entictaaasl—] ! > : wouetie set | law Jor] | & i [Preston INPUT in : g {| [ALARM [Nochange | [ALAR] i Ee { |_ [SNOOZE [Nochange | MabingiweTIme | [Core tNectance ———] | 3 1 [Note SET INPUT pin H o ' the date (display) changes from | + 5 ‘ 3/1 to 2/29, and then to 2/28. |} oa Mocca e eee ce eee eee e cee cee cece cn ee teen eee eens eo sousnueneenntenserecereeeal e Figure 9 Operating State Transitions 4: Calendar Display and Setting Block a No. 4659-16/32 :

Current time display and seiting block, (From initial sate @) Was No To the display and ‘Turn on the display and set the RADIO OUTPUT pin high Fave? ‘ince the input? F Reset the sleep count Reset the sleep count 19.60 minutes, 10.30 minutes. é A Hi Fave > Faved 1 ‘seconds passed ‘seconds passed beeeeeee sees since the since the Hi input? input? H Reset the sleep count 1 to 80 minutes. Vv g Fave 2 t Zeconds passed ‘since the a iow? Reset the sleep count Reset the sleep count to49 minutes to 15 minutes, <ge> ‘Have 2 Have 2 Zeconds passed Zeconds pasted ‘since the since the input? input? Was there an ON Restore the isplay to sotihe RADIO OUTEUT fStare TONswe | [StmteTSleepset eM othe lowlevel. "On" display | [Numbers [— [coin for | | fEolon fo Seconds passed laMeM [or | | [ame [or | since the [Operation + ALARM [ALARM [Nochange | ne a | [SLEEP snooze[— | snooze [= Note: The RADIO OUTPUT pin Note: The slecp setting time is is set to the high level. changed according to “ONT inputs TOA Yes * “ON input”: The application of a high !evel to the MANUAL & SLEEP pin. * When the RADIO OUTPUT pin ovtput is at the high level, the OFF input (pplication of a low level to the MANUAL & SLEEP pin) will always be valid. (If the RADIO OUTPUT pin is at the low level, the sleep counter will be reset and the count stopped.) Figure 10 Operating State Transitions 5: Manual and Sleep Block No. 4659-17/32

oo SSSSSSSSSSSSSSSSSSSSSeee Operation Clearing the Initial Reset State In the initial state when power is first applied, the display reads 12:00 (or 0:00 for 24 hour display) and the numbers and the colon flash alternately. This is called the “initial reset state”. The period of the flashing is 1 Hz. To clear the flashing state, apply a high or low level to the TIME SET INPUT pin when the colon is lit. <~—1H: — : A B ur H i LED display TIME SET INPUT pin input ¥ > ‘VSS? { if © OPEN 1 — : i ut 7 z LED display TIME SET INPUT pin input VO (VSS) H @ OPEN 1 i c D Figure 11 Clearing the Initial Input State Flashing In figure 11, the shaded areas under the LED display line are times when the numbers are lit, At these times the colon will be off. Here, the application of an input to the TIME SET INPUT input @ in the figure when the numbers are lit, ie., the timing indicated by “A”, will be invalid. Since the colon is off at that point, the flashing state will not be cleared. However, such an input is valid at a point when the numbers are off, i.e., the timing indicated by “B”, Since the colon will be lit in this state, the flashing state will be cleared and the clock will enter normal display mode. Alternatively, an input signal such as the TIME SET INPUT input @ in the figure can be applied. Here, the low (or high) level is held until the flashing is cleared at the timing indicated by “D” in the figure. When the flashing state is cleared, the colon also will stop flashing, and remain lit, eee No. 4659-18732

• RT-TIME SET/DIMMER [Pin 29] a DIMMER NOP Current time setting mode (1/4 DUTY) (Current time display) * TIME SET INPUT [Pin 20] a a a | DOWN NOP uP (Back) (Current time display) (Forward) (1) Normal operation (current time display mode) RT-TIME SET/DIMMER pin: Open TIME SET INPUT pin: Open In this state the current time is displayed and inputs to the TIME SET INPUT pin (pin 20) for setting the time will be ignored. (2) Current time setting mode The IC can be switched to the current time setting mode by applying a high level to the RT-TIME SET/DIMMER pin (pin 29). The current time can only be changed in this mode, and is changed by inputs to the TIME SET INPUT pin (pin 20). The current time setting mode and the current time display mode can be distinguished by the state of the colon. If the colon is lit steadily then the IC is in display mode, and if the colon is flashing with a 1 Hz period then the IC is in setting mode. Normally, the clock continues to operate in setting mode. If a high level is applied to the TIME SET INPUT pin in setting mode, the second counter is reset to zero and the time is advanced by one minute. Inversely, if a low level is applied, the second counter is reset to zero and the time is backed up by one minute. In either case, clock operation is interrupted at the point that the input is applied to the TIME SET INPUT pin. Furthermore, if the input is held for over 0.5 to 1.0 seconds, the IC switches to quick forward (or quick reverse) mode. In these modes, counting speed will be 20 msec/count for a 50 Hz input to the 50/60 Hz INPUT pin, and 17 msec/count for a 60 Hz input to that pin. When the time has been set, normal clock operation can be restarted by making the TIME SET INPUT pin open. (3) Dimmer display RT-TIME SET/DIMMER pin: Low level If an RC circuit is connected to the CR OSC pin (pin 19) this input can be used to set the LED lit time to 1/4 of that in normal operation, thus reducing the effective LED brightness. This sets the LED display to a 1/4 duty cycle. In this mode, the LED on time will 1/4 of that in normal operation, with no influence on any other operation. If an RC circuit is not provided the LED output will go to zero, i.e., this input can be used to turn off LED display. This operation is a toggle operation. The first time a low level is applied to the RT-TIME SET/DIMMER pin dimmed display is setup, and the next time a low level is applied the display will return to normal, i No, 4659-19/32

—_. SSsSSSSSSSSSSSSSSSSSSSSSSS Alarm * ALM-A/B DISP & SEL. [Pin 25] a = Alarm B set time display NOP Alarm A set time display (Setting enabled) (Current time display) (Setting enabled) (1) Entering alarm mode Alarm A set time display (setting enabled): High level Alarm B set time display (setting enabled): Low level This pin should be left open in normal operation. Applying a high or low level to this pin displays the set time for alarm A (high level) or alarm B (low level) and enables the alarm time to be set. The display switches to set time display (with an initial value of 12:00 or 0:00) and the colon and the corresponding alarm indicator (ALM INDICATOR) flash in synchronization. (2) Adjusting the set time The alarm time settings are adjusted by displaying the alarm whose setting is to be changed, and then inputting a high or low level to the TIME SET INPUT pin (pin 20). We will refer to these latter operations as “+ input” and “— input” in the remainder of this section. The initial value of the display will be 12:00 (or 0:00) unless there was a previous setting, in which case that value is displayed. The alarms are set in 1 minute increments, and the setting is changed by one minute each time a+ input or a~ input is applied. Furthermore, if the + or - input is applied for more than 0.5 to 1.0 seconds the setting changes at a speed of 20 msec per increment when 60 Hz is input to the 50/60 Hz INPUT pin, and at 17 msec per increment for a 50 Hz input. Note that alarm output will start if the set time and the current time match during alarm setting. (3) Enabling and disabling alarms Use the following methods to enable and disable the alarms. + Enabling an alarm At the point that the set time for the alarm to be operated is displayed, that alarm is enabled, and the alarm indicator (ALM INDICATOR) for that alarm is displayed. * Disabling an alarm When an alarms time setting is displayed, that alarm can be disabled by applying a low level to the MANUAL pin. At this point the colon will blink continuously and the alarm indicator for the corresponding alarm will go out. Note that the set time is maintained, i.e., is not reset. (4) Alarm operating conditions The alarm operates under either of the following conditions: * If the alarm set time and the current time agree when alarm operation is enabled. » If the alarm set time and the current time agree while setting the alarm time, i.e., while advancing or backing up the alarm time setting. (5) Alarm operation termination conditions Alarm output stops if any of the following conditions are met. + If a high or low level is applied to the MANUAL & SLEEP pin (pin 26). + If there was a snooze input, i.e., if either a high or low level was applied to the CAL DISP & SNOOZE pin). Note that alarm output will resume once the snooze setting period has elapsed. * Ifa total time of 59 minutes (excluding the snooze interrupt periods) has passed since the start of the alarm output. + If the other alarm starts operation during alarm output. (See item (7), “Output.”) + If the other alarm starts operation during an interruption of alarm output due to the snooze function. (See item (7), . “Output.”) | No, 4659-20/32 ‘

$$ $A SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSe Calendar (1) Overview This IC includes a one year calendar on-chip. It only supports month and date displays, and does not provide a day of the week display. The following calendar table is included on-chip. DC This calendar function can display February 29 to handle leap year’s day. + During calendar display the AM/PM indicator and the colon are turned off. : + Alarm indicators for enabled alarms (ALM INDICATOR) are lit. : + The display format can be switched to be either month-day or day-month. (2) Functions * CAL. DISP & SNOOZE [Pin 21} fogs pv Calendar display and set NOP Calendar display and set (Month-day display) (Current time display) (Day-month display) Snooze-in Snooze-in + When a high level is applied to the CAL DISP & SNOOZE pin (pin 21) the calendar is displayed in the day-month format, and when a low level is applied it is displayed in the month-day format. » The calendar is set using either a high level or a low level input to the TIME SET INPUT pin (pin 20) while the calendar is displayed. (3) Operation + Display The calendar is displayed when either a high or a low level is applied to the CAL DISP & SNOOZE pin (pin 21). Only numbers and the alarm indicators for alarms that are enabled are displayed; the other segments (AM/PM and the colon) are turned off. ——Nommal emf ex afet display- voo (Vv ce Input level OPEN @ Normal operation However, note that the CAL DISP & SNOOZE pin operates as snooze function input during alarm signal output and periods when the alarm output is interrupted by the snooze function. During those times the calender is not displayed. Ouring alarm _.|_-_ The alarm signal is not output — output (normal display) i Normal dis ~—— Normal display te (Tha calordat can nt be displayed.) — Vo (VSS) Input level gpey @ During alarm signal output Figure 16 Caléndar Display Setting No. 4659-23/32

oe eeeSSsSSSSSSSSSSSSSSSSSSSSSSsSSEeeseseseeeeeeee * Operating conditions — Normal operation : When the time advances from 23:59 to 0:00 (0:00 a.m.), the date is advanced by 1 day. — Current time setting mode | The clock time setting is advanced or set back in current time setting mode. If the time setting passes through 0:00 a.m. during that operation, the calendar is advanced or set back by one day. ' — During calendar display | Ifa high level is applied to the TIME SET INPUT pin during calendar display, the date is advanced by one day, and if a low level is applied, it is set back by one day. + Setting — The calendar can be set during calendar display The calendar display following initial reset, i.e., the initial value, will be January 1, the TIME SET INPUT pin is used for setting the date. Ifa high level is applied to the TIME SET INPUT pin during calendar display, the date is advanced by one day, and if a low level is applied, it is set back by one day. In either case, if the input is applied for more than 0.5 to 1.0 seconds the setting changes at a speed of 20 msec per increment when 60 Hz is input to the 50/60 Hz INPUT pin, and at 17 msec per increment for a 50 Hz input. — Only the day can be changed directly using the TIME SET INPUT pin. To change the month, count either up or down through the days of the month. For example, 1/30 > 1/31 — 2/1, or 2/2 > 2/1 > 1/31. — Displaying leap year’s day (2/29) To display leap year’s day, with the calender display set to 3/1, apply a low level to the TIME SET INPUT pin for more than 20 msec and less than 0.5 seconds, i.e., back up the date one day. In normal operation, the date advances from 2/28 to 3/1, but in date backup, the date changes from 3/1 to 2/29 and then to 2/28. 3/2 — 3/1 2/29 > 2/28...: Display when setting the calendar in the reverse direction i ——_— SSSSSSSsSSSss : No, 4659-24/32 |

L085632 ; oo SeeeeSSsSSsSSSsssSSSSseeeee (3) The IC determines whether power has been lost based on whether there is an AC input to the 50/60 Hz INPUT pin. » Determining that power has been lost When the AC input falls under 1 Hz, the IC determines that power has been lost and stops display output. However, this determination is performed by comparing that input with the frequency from the RC oscillator on the CR OSC pin. If the CR OSC pin is not used, the IC will not check for power outages. Note that a high level should be applied to the CR OSC pin if it is not used. + Power outage operation If a backup oscillator is connected to the CR OSC pin, at the point that a power outage is detected LED segment output and RADIO OUTPUT pin output are stopped. Also, if an alarm has been interrupted by the snooze function, the snooze function is cleared and the alarm output restarted. At this point the clock operation will continue using the backup oscillator. During a power outage, only the OFF input (a low level to the MANUAL & SLEEP pin) is valid, and all other operation inputs are disabled. During the backup state following a power outage detection, at the point that the AC input is restored to a frequency over 1 Hz the IC switches from operation based on the RC oscillator to operation based on AC input. The display indicates a power outage by displaying the current time flashing at 1 Hz. However, alarm indicators for enabled alarms will be lit and not flashing. Apply a high or low level to the TIME SET INPUT pin to stop the flashing and return to normal display. Note that if the conditions for an alarm are fulfilled, that alarm will be output even during a power outage. If a backup oscillator is not connected to the CR OSC pin, all operations will halt. That is, power outage detection and backup operation are not performed. Also, the following operations will be performed after recovery from a Power outage. — Ifthe rated power supply voltage (4.0 to 6.0 V) was maintained: Clock operation restarts from the point power was lost. — If the power supply voltage fell below the rated vollage: The IC returns to the initial start state. + Current time during a power outage The current time is maintained during a power outage using a clock signal generated by dividing the oscillation frequency of the RC oscillator circuit. The standard oscillation frequency of the RC oscillator circuit is 4800 Hz. When the mode is set to 50 Hz mode, the 4800 Hz signal is divided by 96 to form a 50 Hz signal, and when set to 60 Hz mode, the 4800 Hz signal is divided by 80 to form a 60 Hz signal. Colon (1) Remains lit during normal operation. (2) Flashes at 1 Hz following a initial reset, following recovery from a power outage, and during time setting modes for the current time, alarm A, and alarm B. (3) Turns off during calendar display and the “On” and sleep time displays. i i No. 4659-28/32 ' i

— KS] Self Test Mode * TEST [Pin 18] [vss open 00 LED self test mode. IC test, legal setting This IC provides a self-test mode for testing the LED display and the three value input pins. It supports the following tests. The LEDs can be tested for failure to light and for unbalanced intensity. This test mode is entered when a low level is applied to the TEST pin (pin 18), and all LED segments are lit. In this state, the LED segments can be turned off individually by applying high or low levels to the three value input pins. The correspondence between the applied inputs and the segments that are turned off is shown in the table below. : finputpin TT eputiovet Corresponding LED segment? RT-TIME SET High level a segment’? ‘TIME SET INPUT High tevel b segment TIME SET INPUT Low level c segment ALM-AB DISP & SEL High level d segmentz ALM-AB DISP & SEL Low level @ segment MANUAL & SLEEP High level f segment MANUAL & SLEEP Low level 9 Segment CAL DISP & SNOOZE Boths COLON RT-TIME SET Low fevel ‘AM, PM, ALM-A, ALM-B. Note: 1. The LED segments are lt or turned off at the same time lor all digits. For example, after setting the IC to LED test mode, if high levels applied to the TIME SET INPUT pin, then ail 4 a segments (one LED in each 4 digits) are turned off. 2. Due to details of the output pins only the 10°SHR d segment is not linked to rest of the d segment, butis turned olf an on along with the a segment. 3. Operates identically for both high and low level signals, 4. Since the operations in the above table are toggle operations, repeated application of signals to the three value inputs will repeatecly turn each segment on and off 5. When the IC is in the LED test mode, the MODE SELECT pin must be held at either the high, open, or low level. Operation of the IC is not guaranteed if the signal on the MODE SELECT pin changes while the IC is in the LED test mode. 6. The TEST pin must be left open during normal operation. 7. Do not change the setting on the MODE SELECT pin (pin 28) when the IC in self test mode. System operation is not guarantead if this setting is changed. ee SSSSSSSSSSSsSSsSSSsSsSSsSsSsSsSsssssssSSSSSSSSSS No. 4659-29/32

The priority order for display when inputs are applied to two or more of the following pins at the same time is shown in the box below. * CAL DISP & SNOOZE (pin 21) « ALM-A/B DISP & SEL (pin 25) * MANUAL & SLEEP (pin 26) ¢ RT-TIME SET/DIMMER (pin 29) Current time display < Sleep ON display < Alarm setting time display < calender and snooze displays Example: If a high level is applied at the same time to both the ALM-A/B DISP & SEL and the CAL DISP & SNOOZE pins in current time display (setting) mode, then the display will switch to calendar display. IH No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. @ Anyone purchasing any products described or contained herein for an above-mentioned use shall ® Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: @ Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO, LTO,, its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. Mi Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guarant- eed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. No. 4659-30/32

MAMUAL/ CAL DISP/ ALWHA/B TIME SET RT~TIME SET/ 50/60HZ ‘MODE SLEEP © SWOOZE DISP § SEL INpBT DIMMER inpup, CR OSC serecT fe) O fe) fe) fe) Oo .0 "O « Cr] + g/L al lz iN = g| |x [_ Pore ue] S| 1s DISPLAY INPUT TIMESET CONTROL CONTROL [care } See PRE COUNTER COUNTER sures Yo GY i 2222 ge RESET wo SETCK wove cx’ g295%¢8 3 s 5 s Sa 225G 5 5S 5.2 5° os 5 ee 2g geo 2g ' 2S 6 5 8 #35 25 § ww BS SNOOZE SLEEP ALW-A ALA-B TIWE CALENDER: COUNTER RESET COUNTER RESET ‘COUNTER ‘COUNTER ‘COUNTER COUNTER . IDAY | ‘ALMA STOP WARUAL ‘ALM~B STOP OUTPUT CONTROL aun Tove CALW-A OUTPUT OALu-B OUTPUT CQRADIO OUTPUT ALARM INDICATOR CALENDER SLEEP ALM-~B ALM-A TIME SEC nf OUTPUT DECODER/DRIVER SEGMENT OUTPUTS Note: ~-Three value input circuit Figure 23 LC85632 Block Diagram No. 4659-31/32

easels [4 = a 7 #28 8 & 8 ese ~ = % ®? a This input current 6B & 2a & ws limiting resistor eo 7 8 oe 8 8 must be used. w a $s 2 2 = | 3 100k =z OF 5 3 ALAA OUTPUT burt» 50/60Hz INPUT a Fi} 2 |_ 3 3 sooo & AUB OUTPUT me “ae sactoue 8 yO 4 2E SE FE SE ov ov Ree waaagzoowes 8 WO by SOB Regeeo reson © BY zeeegeseeoSSSss s moo revi} Open 68 k 35-4700 p Segment outputs : . Connect the CR OSC pin to VOD if power outage backup and alarm output are not used. AM ALA ° ° Px ° ° : ° 10’SHR HR = «10°SMIN. WIN ALW-B cou _cow2 Duplex use LED panel

5 Drive phase 1 | Drive phase 2

a || a] i E + 4 Unit (resistance: Q, capacitance: F) ' Figure 24 LC85632 Application Circuit : a No. 4659-32732