AS1107 TAOS | Alldatasheet
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Technical content
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1 General Description
need for continuous device reprogramming. directly address each segment. be reset by software, and an external clock is also supported. Several test modes are available for easy application debugging. Figure 1. AS1106, AS1107 - Typical Application Diagram
2 Key Features
3 Applications
equipment, industrial controllers and panel meters.
8 Digits
8 Segments
4 Pin Assignments
Figure 2. DIP and SO Pin Assignments (T op View)
4.1 Pin Descriptions
11 DIG 0:DIG 7
are high-impedance when turned off. 4, 9 GND Ground. Both GND pins must be connected.
12 LOAD/CSN
13 CLK
the AS1107 or AS1106 SPI-enabled, the CLK input is active only while LOAD/CSN is low. Selecting RSET Resistor Value and Using External Drivers on page 14). 19 VDD Positive Supply Voltage. Connect to +2.7 to +5.5V supply. pin is used to daisy-chain several AS1106/AS1107 devices and is never high-impedance.
5 Absolute Maximum Ratings
maximum rating conditions for extended periods may affect device reliability. Table 2. Absolute Maximum Ratings
- only valid for the SOIC 24-pin package
6 Electrical Characteristics
Conditions: VDD = 2.7V to 5.5V, RSET = 9.53kΩ±1%, TAMB = TMIN to TMAX (unless otherwise specified). Table 3. Electrical Characteristics
- See Figure 12 on page 8 for more information.
- All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality
Table 5. Timing Characteristics
7 Typical Operating Characteristics
VDD = 5V, RSET = 9.53kΩ, TAMB = 25ºC (unless otherwise specified). Figure 3. Scan Frequency vs.T emperature Figure 4. Scan Frequency vs. V DD Figure 5. ISEG vs. T emperature Figure 6. ISEG vs. VDD
8 Detailed Description
The AS1107 segment drivers are slew-rate limited to reduce electromagnetic interference (EMI). The AS1107 serial interface is fully SPI compatible (programmable for AS1106).
8.2 Serial-Addressing Format
serial interface. A programming sequence consists of 16-bit packages as listed in Table 6. latched into a digit- or control-register. The LOAD/CSN signal must go high after the 16th rising clock edge. contents of the internal shift register are applied 16.5 clock cycles later to pin DOUT. The data is clocked out at the falling edge of CLK. significant bit (MSB). The exact timing is shown in Figure 12.
8.3 Initial Power-Up
mode. At this time, all registers should be programmed for normal operation. is set to the minimum values. Figure 12. Interface Timing Table 6. 16-Bit Serial Data Format
8.4 Shutdown Mode
connected to VDD, so that all segments are blanked. The AS1107 behavior is identical except the drivers are high impedance. Note: During shutdown mode the Digit-Registers maintain their data. leaving shutdown mode). For minimum supply current in shutdown mode, logic input should be at GND or VDD (CMOS logic level). display test mode (see page 11) overrides shutdown mode.
8.5 Digit- and Control-Registers
address word, and communication is done via the serial interface.
- When Shutdown Register bit D7 = 1, the Feature Register is left unchanged when entering or leaving shutdown mode.
Table 7. Register Address Map
8.5.1 Shutdown Register (0xXC)
The Shutdown Register controls AS1106/AS1107 shutdown mode (see Shutdown Mode on page 9).
8.5.2 Decode Enable Register (0xX9)
bit D1 corresponds to digit 1 and so on). Table 10 lists some examples of the possible settings for the Decode Enable Register bits. Note: A logic high enables decoding and a logic low bypasses the decoder altogether. When decode mode is used, the decoder looks only at the lower-nibble (bits D3:D0) of the data in the Digit-Registers, disregarding bits D6:D4. code-B font; Table 11 lists the HEX font. shows the 1:1 pairing of each data bit to the appropriate segment line. Figure 13. Standard 7-Segment LED Intensity Control and Inter-Digit Blanking Table 8. Shutdown Register Format (Address (HEX) = 0xXC))
0 X 0000 1111110
1 X 0001 0110000
2 X 0010 1101101
3 X 0011 1111001
4 X 0100 0110011
8.5.3 Display-Test Register (0xXF)
Note: All settings of the digit- and control-registers are maintained.
5 X 0101 1011011
6 X 0110 1011111
7 X 0111 1110000
8 X 1000 1111111
9 X 1001 1111011
The decimal point is enabled by setting bit D7 = 1. Table 11. HEX Font
0 X 0000 1 1 1 1110
1 X 0001 0 1 1 0000
2 X 0010 1 1 0 1101
3 X 0011 1 1 1 1001
4 X 0100 0 1 1 0011
5 X 0101 1 0 1 1011
6 X 0110 1 0 1 1111
7 X 0111 1 1 1 0000
8 X 1000 1 1 1 1111
9 X 1001 1 1 1 1011
The decimal point is enabled by setting bit D7 = 1. Table 13. Display-Test Register Format (Address (HEX) = 0xXF))
8.5.4 Intensity Control Register (0xXA)
Selecting RSET Resistor Value and Using External Drivers on page 14). Display brightness is controlled by an integrated pulse-width modulator which is controlled by the lower-nibble of the Intensity Control Register.
8.5.5 Scan-Limit Register (0x0B)
maximum allowed current when fewer than 4 digits are used. Note: To avoid differences in brightness this register should not be used to blank parts of the display (leading zeros). Table 14. Intensity Register Format (Address (HEX) = 0xXA)) Table 16. Maximum Segment Current for 1-, 2-, or 3-Digit Displays
8.5.6 Feature Register (0xXE)
blinking rate, and resetting the blink timing. Note: At power-up the Feature Register is initialized to 0.
8.5.7 No-Op Register (0xX0)
LOAD/CSN and CLK signals are connected to all devices. commands and only the fifth device will receive the intended operation command, and subsequently update its register. Table 17. Feature Register Summary Table 18. Feature Register Bit Descriptions (Address (HEX) = 0xXE)) Enables and disables various device features. 0 = Internal oscillator is used for system clock. 1 = Pin CLK of the serial interface operates as system clock input. Resets all control registers except the Feature Register. 0 = Reset Disabled. Normal operation. Note: The Digit Registers maintain their data. 0 = Enable Code-B decoding (see Table 10 on page 10). 1 = Enable HEX decoding (see Table 11 on page 11). Enables the SPI-compatible interface. 0 = Disable SPI-compatible interface (AS1106 only). 1 = Enable the SPI-compatible interface (AS1106 only). Note: The SPI-compatible interface is always enabled in the AS1107. 0 = Blink period typically is 1 second (0.5s on, 0.5s off). 1 = Blink period is 2 seconds (1s on, 1s off). determines how blinking starts. 0 = Blinking starts with the display turned off. 1 = Blinking starts with the display turned on.
9 Application Information
9.1 Supply Bypassing and Wiring
electromagnetic interference and wiring inductance. supply ripple (see Figure 14 on page 16). Note: Both GND pins must be connected to ground.
9.2 Selecting R SET Resistor Value and Using External Drivers
needed, external drivers must be used, in which case it is no longer necessary that the devices drive high currents. SET must be set accordingly. Note: The display brightness can also be logically controlled (see Intensity Control Register (0xXA) on page 12). Table 19. RSET vs. Segment Current and LED Forward Voltage, VDD = 2.7V Table 20. RSET vs. Segment Current and LED Forward Voltage, VDD = 3.3V Table 21. RSET vs. Segment Current and LED Forward Voltage, VDD = 3.6V Table 22. RSET vs. Segment Current and LED Forward Voltage, VDD = 4.0V
9.3 Calculating the Power Dissipation
DUTY is the duty cycle set by intensity register (page 12). The TAMB limit for SO Packages in the dissipation example above is +58.6°C. Table 23. RSET vs. Segment Current and LED Forward Voltage, VDD = 5.0V Table 24. Package Thermal Data
24 Narrow DIP +75°C/W
24 Wide SOIC +85°C/W
The application example in Figure 14 shows the AS1106 as an 8x8 LED dot matrix driver. the 64 LEDs can be addressed separately. The columns are selected via the digits as listed in Table 7 on page 9. addressed as described in Table 12 on page 11, where bit D0 corresponds to segment G and bit D7 corresponds to segment DP. Note: For a multiple-digit dot matrix, multiple AS1106 devices must be cascaded. Figure 14. Application Example as LED Dot Matrix Driver
9.5 Cascading Drivers
value so that one display will not appear brighter than the other. Note: Refer to No-Op Register (0xX0) on page 13 for additional information.
Figure 15. AS1106, AS1107 Marking Table 25. Packaging Code
Figure 16. SOIC 24-pin Package
Figure 17. PDIP 24-pin Package
- For more Information on the PDIP 24-pin package see Ordering Information on page 20.
www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.28 20 - 21 AS1106, AS1107 Datasheet - Ordering Information The AS1106 and AS1107 are available as the standard products shown in Table 26. Note: All products are RoHS compliant. Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect Technical Support is found at http://www.austriamicrosystems.com/Technical-Support For further information and requests, please contact us mailto:sales@austriamicrosystems.com or find your local distributor at http://www.austriamicrosystems.com/distributor T able 26. Ordering Information Ordering Code Marking Description Temperature Range Delivery Form Package AS1106PL 1. The PDIP 24-pin Package reached end of life. There is the possibility for a last time buy order until end of July 2011. AS1106PL 8-Digit LED Display Drivers 0 to +70°C Tubes PDIP 24-pin AS1106WL AS1106WL 8-Digit LED Display Drivers 0 to +70°C Tubes SOIC 24-pin AS1106WL-T AS1106WL 8-Digit LED Display Drivers 0 to +70°C Tape and Reel SOIC 24-pin AS1106PE
1 AS1106PE 8-Digit LED Display Drivers -40 to +85°C Tubes PDIP 24-pin
AS1106WE AS1106WE 8-Digit LED Display Drivers -40 to +85°C Tubes SOIC 24-pin AS1106WE-T AS1106WE 8-Digit LED Display Driv ers -40 to +85°C Tape and Reel SOIC 24-pin AS1107PL
1 AS1107PL 8-Digit LED Display Driv ers -40 to +85°C Tubes PDIP 24-pin
AS1107WL AS1107WL 8-Digit LED Display Drivers -40 to +85°C Tubes SOIC 24-pin AS1107WL-T AS1107WL 8-Digit LED Display Drivers -40 to +85°C Tape and Reel SOIC 24-pin ams AG Technical content still valid
www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.28 21 - 21 AS1106, AS1107 Datasheet Copyrights Copyright © 1997-2010, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact ams AG Technical content still valid