Portwell WADE-8213-Q670E, Руководство пользователя

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WADE-8213-Q670E
Copyright © Portwell 2022 WADE-8213-Q670E User's Guide 42
5 Signal Descriptions
5.1 Watch Dog Signal
WDT setting
SIO_INDEX_PORT is 0x2E
SIO_DATA_PORT is 0x2F
1. Set WDT Time Unit
Outportb(SIO_INDEX_PORT, 0x87); // Unlock SIO
Outportb(SIO_INDEX_PORT, 0x87); // Unlock SIO
Outportb(SIO_INDEX_PORT, 0x07);
Outportb(SIO_DATA_PORT, 0x08);
Outportb(SIO_INDEX_PORT, 0xF0); //select WDT setting
val = Inportb(SIO_DATA_PORT) // Read current WDT setting
val = val | 0x08; // minute mode, val = val& 0xF7 if second mode
Outportb(SIO_INDEX_PORT, 0xF0); //select WDT setting
Outportb(SIO_DATA_PORT, val); // Write back WDT setting
Outportb(SIO_INDEX_PORT, 0xAA); // Lock SIO