AOpen DEX4500 series Assembly Manual page 46

Set Min/Sec Mode
Start Timer
End
1. Set Mode
(1)set -> Logical Device: 0x08
CR: 0xF5
Bit: 3
1. Set Mode
(1)set -> Logical Device: 0x08
CR: 0xF6
Bit: 7~0
= 0x01 Time- out occur after 1
second/minute
.
.
.
.
= 0xFF Time- out occur after 255 second/minute
45
= 0 By second
= 1 By minute