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CHAPTER 7 - Chapter 7 Watch-Dog-Timer (WDT) Setting
74
SPI-8450-LLVA
Here is a example for programming Watch dog timeout in "debug" mode.
o 2e 87 : Output data 87h to I/O address 2eh.
i 2f : Input data from I/O address 2fh.
Start WDT
o 2e 87
o 2e 87
o 2e 2b
o 2f 0d
o 2e 07
o 2f 08
o 2e 30
o 2f 01
o 2e f5
o 2f 00 ;00(unit for second)
o 2e f6
o 2f xx ;any value by user select(xx: 01h=1sec. – FFh=255sec.)
o 2e f7
i 2f ;bit4=1:detect time up of WDT, =0:run WDT
Stop WDT
o 2e f6
o 2f 00
o 2e f7
o 2f 00
Note: The timer’s intervals have a tolerance of ± 2 seconds.