Aaeon COM-690T Manual
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Contents
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C O M E x p r e s s M o d u l e C O M - 6 9 0 T / C O M - 6 9 0 EAppendix A Programming the Watchdog Timer A-2A.1 General InformationThe COM-690T/COM-690E utilizes Fintek F75111 chipset as itswatchdog timer Controller.The other Watchdog timer is set to second or minute and the range is 0to 256 seconds or minutes.When the timeout has occurred, that will generate a status bit to indicateit and write one will be clear.A.2 Access InterfaceThe F75111 provides one serial access interface, I2C Bus, to read/writeinternal registers. The address of Serial Bus isconfigurable by using power-on trapping of standby power VBS3V. Thepin 3 (GPIO13/I2C _ADDR) is multi-function pin. During theVSB3V power-on, this pin serves as input detection of logic high or logiclow. This pin is default pull-down resistor with 100K ohmsmapping the Serial Bus address 0x9C (1001_1100). Another Serial Busaddress 0x6E (0110_1110) is set when external pull-up resistor with10K ohms is connected in this pin. |
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