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S-35710B01A-K8T2U Datasheet(PDF) 11 Page - Seiko Instruments Inc |
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S-35710B01A-K8T2U Datasheet(HTML) 11 Page - Seiko Instruments Inc |
11 / 33 page FOR AUTOMOTIVE 125°C OPERATION 2-WIRE CONVENIENCE TIMER Rev.1.5_00 S-35710 Series 11 INT Pin Interrupt Signal Output The INT pin interrupt signal output (time-out type) can be selected from either of the following: • One-shot loop time-out • Handshake time-out 1. One-shot loop time-out One-shot loop time-out is a type to output "L" pulse interrupt signal repeatedly from the INT pin. After the RST _______ pin changes from "L" to "H", the timer starts the operation. Then, the INT pin outputs "L" pulse when the timer value matches the value written to the wake-up time register. After that, the S-35710 Series resets the timer automatically, and restarts a count-up action. Remark The above description is the example of Nch open-drain output product. In CMOS output product, the INT pin output is the inverse logic of Nch open-drain output product. 1. 1 Write mode If write operation is performed to the wake-up time register during the count-up action, the action will be restarted after resetting the timer. This operation is called "write mode". If "L" is input to the RST _______ pin before the timer value matches the value written to the wake-up time register, the timer and the wake-up time register are reset. RST Timer Wake-up time register INT 7.8 ms 2s 1 s 7.8 ms 2 s 7.8 ms 1s 1s 7.8 ms "2 h" "0 h" "1 h""0 h" "1 h" "0 h" "2 h" "2 h" "1 h""0 h" "0 h" "1 h" "1 h" "0 h" "1 h" "0 h" "000000 h" "000001 h" "000002 h" "000000 h" INT pin performs the one-shot output periodically Count-up action starts Timer is reset and count-up action restarts Timer and wake-up time register are reset Timer and wake-up time register are reset Timer is reset and count-up action restarts Count-up action starts Figure 12 Output Timing of One-shot Loop Time-out (Nch Open-drain Output) RST Timer Wake-up time register 7.8 ms 2s 1 s 7.8 ms 2 s 7.8 ms 1s 1s 7.8 ms "2 h" "0 h" "1 h""0 h" "1 h" "0 h" "2 h" "2 h" "1 h""0 h" "0 h" "1 h" "1 h" "0 h" "1 h" "0 h" "000000 h" "000001 h" "000002 h" "000000 h" INT pin performs the one-shot output periodically Timer is reset and count-up action restarts INT Timer and wake-up time register are reset Timer and wake-up time register are reset Timer is reset and count-up action restarts Count-up action starts Count-up action starts Figure 13 Output Timing of One-shot Loop Time-out (CMOS Output) |
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