User guide

Note1:
The N has 8 bits. Only bits 4,5 are programmable.
" 1" means that the bit is programmed to input.
" 0" means that the bit is programmed to output.
User have to keep the value of Bit0~Bit3 and Bit6~7, to prevent from effect the status of COM Port.
Ex:
N=30h=00110000b
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
No use
No use
LED1
as output
LED0
as output
No use
No use
No use
No use