SN8P1700
8-bit micro-controller build-in 12-bit ADC
11 I/O PORT
OVERVIEW
The SN8P1700 provides up to 5 ports for users’ application, consisting of one input only port (P0), four I/O ports (P1,
P2, P4, P5). The direction of I/O port is selected by PnM register and a macro @SET_PUR is defined for user setting
pull-up register. After the system resets, all ports work as input function without pull-up resistors.
Port1, 2, 4, 5 structure
Port0 structure
PUR
PUR
PnM
PnM
Pin
Latch
Int. bus
Pin
Int. bus
PnM
Figure 11-1. The I/O Port Block Diagram
ꢂ
Note : All of the latch output circuits are push-pull structures.
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