Preliminary
SN8P1702A/SN8P1703A
8-bit micro-controller build-in 12-bit ADC
10 I/O PORT
OVERVIEW
The SN8P1702A/SN8P1703A provides up to 4 ports for users’ application, consisting of one input only port (P0), four
I/O ports (P1, P4, P5). The direction of I/O port is selected by PnM register and PnUR register (N=0,1,4,5) is defined for
user setting pull-up register. After the system resets, all ports work as input function without pull-up resistors.
Port1, 4, 5 structure
Port0 structure
PUR
PUR
PnM
PnM
Pin
Latch
Int. bus
Pin
Int. bus
PnM
Figure 10-1. The I/O Port Block Diagram
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Note : All of the latch output circuits are push-pull structures.
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