AS1106 AMSCO | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 20
Technical content
1 General Description
ire as well as a conventional 4-wire serial interface. brightness can be controlled by analog or digital means. directly address each segment. Figure 1. Typical Application Diagram
2 Key Features
3 Applications
8 Digits
8 Segments
4 Absolute Maximum Ratings
Table 1. Absolute Maximum Ratings
- The reflow peak soldering temperature (body temperature) is specified according to IPC/JEDEC J-STD-020C
Moisture/Reflow Sensitivity Classification for non-hermetic Solid State Surface Mount Devices.
- Specified according JESD22-B106 Resistance to Soldering Temperature for Through-Hole Mounted Devices.
- Norm: MIL 883 E method 3015.
5 Electrical Characteristics
Conditions: VDD = 2.7 to 5.5V, RSET = 9.53kΩ±1%, TAMB = TMIN to TMAX (unless otherwise specified). Table 2. Electrical Characteristics Table 3. Logic Inputs/Outputs Characteristics
Note: See Figure 11 on page 7 for more information. Table 4. Timing Characteristics
6 Typical Operating Characteristics
VDD = 5V, RSET = 9.53kΩ, TAMB = 25ºC (unless otherwise specified). Figure 2. Scan Frequency vs.Temperature Figure 3. Scan Frequency vs. V DD Figure 4. ISEG vs. Temperature Figure 5. I SEG vs. VDD Figure 6. AS1106 Segment Output Current Fi gure 7. AS1107 Segment Output Current
7 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). on page 8) via the 4-wire serial interface. A programming sequence consists of 16-bit packages as listed in Table 5. clocked out at the falling edge of CLK. The first 4 bits (D15:D12) are don't care, bits D11:D8 contain the register address, and bits D7:D0 contain the data. The first bit is D15, the most significant bit (MSB). The exact timing is shown in Figure 11. device goes into shutdown mode. At this time, all registers should be programmed for normal operation. Register (see page 11) is set to the minimum values. Figure 11. Interface Timing Table 5. 16-Bit Serial Data Format
behavior is identical except the drivers are high impedance. Note: During shutdown mode the Digit-Registers maintain their data. be at GND or VDD (CMOS logic level). grammable. Only the display test mode (see page 10) overrides shutdown mode. Register bit D7 (page 9) = 0. are selected using a 4-bit address word, and communication is done via the serial interface. without rewriting the whole register contents. down, display test and features selection registers.
- When Shutdown Register bit D7 = 1, the Feature Register is left unchanged when entering or leaving shut-
Table 6. Register Address Map
The Shutdown Register controls AS1106/AS1107 shutdown mode (see Shutdown Mode on page 8). on). Table 9 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. D7 = 1 turns the decimal point on). Table 9 lists the code-B font; Table 10 lists the HEX font. AS1106/AS1107. Table 11 shows the 1:1 pairing of each data bit to the appropriate segment line. Figure 12. Standard 7-Segment LED Intensity Control and Inter-Digit Blanking Table 7. Shutdown Register Format (Address (HEX) = 0xXC)) Table 8. Decode Enable Register Format (Address (HEX) = 0xX9)) Table 9. Code-B Font
0 X 0000 1111110
1 X 0001 0110000
2 X 0010 1101101
3 X 0011 1111001
4 X 0100 0110011
display-test mode until the Display-Test Register is set for normal operation. 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 10. HEX Font
0 X 0 0 0 0 1111110
1 X 0 0 0 1 0110000
2 X 0 0 1 0 1101101
3 X 0 0 1 1 1111001
4 X 0 1 0 0 0110011
5 X 0 1 0 1 1011011
6 X 0 1 1 0 1011111
7 X 0 1 1 1 1110000
8 X 1 0 0 0 1111111
9 X 1 0 0 1 1111011
The decimal point is enabled by setting bit D7 = 1. Table 11. No-Decode Mode Data Bits and Corresponding Segment Lines Table 12. Display-Test Register Format (Address (HEX) = 0xXF)) Table 9. Code-B Font (Continued)
means using RSET (see Selecting RSET Resistor Value and Using External Drivers on page 13). down to 1/32 (15/16 to 1/16 for the AS1107) of the peak current set by RSET. update frequency is typically 800Hz. If the number of digits displayed is reduced, the update frequency is increased. 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 13. Intensity Register Format (Address (HEX) = 0xXA)) Table 14. Scan-Limit Register Format (Address (HEX) = 0xXB)) Table 15. Maximum Segment Current for 1-, 2-, or 3-Digit Displays
SPI-compatible interface (AS1106 only), setting the blinking rate, and resetting the blink timing. Note: At power-up the Feature Register is initialized to 0. AS1106/AS1107 (see Figure 13 on page 15). The LOAD/CSN and CLK signals are connected to all devices. operation command, and subsequently update its register. Table 16. Feature Register Summary Table 17. 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. Register) identically after power-up. Note: The Digit Registers maintain their data. 0 = Enable Code-B decoding (see Table 9 on page 9). 1 = Enable HEX decoding (see Table 10 on page 10). 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). blink timing can be synchronized across all the devices. bit D7 determines how blinking starts. 0 = Blinking starts with the display turned off. 1 = Blinking starts with the display turned on.
8 Typical Application
mize effects of electromagnetic interference and wiring inductance. GND to avoid power supply ripple (see Figure 13 on page 15). Note: Both GND pins must be connected to ground. current that flows through the LEDs. necessary that the devices drive high currents. Note: The display brightness can also be logically controlled (see Intensity Control Register (0xXA) on page 11). Table 18. RSET vs. Segment Current and LED Forward Voltage, VDD = 2.7V Table 19. RSET vs. Segment Current and LED Forward Voltage, VDD = 3.3V Table 20. RSET vs. Segment Current and LED Forward Voltage, VDD = 3.6V Table 21. RSET vs. Segment Current and LED Forward Voltage, VDD = 4.0V
DUTY is the duty cycle set by intensity register (page 11). The TAMB limit for SO Packages in the dissipation example above is +58.6°C. Table 22. RSET vs. Segment Current and LED Forward Voltage, VDD = 5.0V Table 23. Package Thermal Data
24 Narrow DIP +75°C/W
24 Wide SOIC +85°C/W
Table 21. RSET vs. Segment Current and LED Forward Voltage, VDD = 4.0V (Continued)
The application example in Figure 13 shows the AS1106 as an 8x8 LED dot matrix driver. D7 corresponds to segment DP . Note: For a multiple-digit dot matrix, multiple AS1106 devices must be cascaded. Figure 13. Application Example as LED Dot Matrix Driver should be set to the same value so that one display will not appear brighter than the other. because its duty cycle per digit will be 1/5 and the other displays duty cycle will be 1/6. Note: Refer to No-Op Register (0xX0) on page 12 for additional information.
9 Pinout and Packaging
Figure 14. DIP and SO Pin Assignments (Top View) Table 24. Pin Descriptions off. The AS1107 digit drivers are high-impedance when turned off. GND 4, 9 Ground. Both GND pins must be connected. on the rising edge of this pin. data are latched on the rising edge of this pin. CLK input is active only while LOAD/CSN is low. segment drivers are high-impedance when turned off. DD 19 Positive Supply Voltage. Connect to +2.7 to +5.5V supply. and is never high-impedance.
The AS1106 and AS1107 are available in 24-pin DIP and 24-pin SOIC packages. Figure 15. 24-pin DIP Package
Figure 16. 24-pin SOIC Package
- Controlling dimension is millimeters.
The AS1106 and AS1107 are available in 24-pin DIP and 24-pin SOIC packages. Table 25. Ordering Information
www.austriamicrosystems.com Revision 2.2 20 - 20 AS1106, AS1107 austria micro systems Data Sheet Copyrights Copyright © 1997-2005, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, trans- lated, 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. austriami- crosystems 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. 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 tech- nical 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 A-8141 Schloss Premstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 e-mail: info@austriamicrosystems.com For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com austria micro systems a leap ahead