SONIX SN8P26L38, User Manual

Page: 78 / 136

SN8P26L38
8-Bit Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 78
Version 1.5
7.2
I/O PORT MODE
The port direction is programmed by PnM register. All I/O ports can select input or output direction.
0B8H Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
P0M P07M P06M P05M P04M P03M - P01M P00M
Read/Write R/W R/W R/W R/W R/W - R/W R/W
After reset 0 0 0 0 0 - 0 0
0C1H Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
P1M P17M P16M P15M P14M P13M P12M P11M P10M
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
After reset 0 0 0 0 0 0 0 0
0C2H Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
P2M P27M P26M P25M P24M P23M P22M P21M P20M
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
After reset 0 0 0 0 0 0 0 0
0C3H Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
P3M - - - - P33M P32M P31M P30M
Read/Write - - - - R/W R/W R/W R/W
After reset - - - - 0 0 0 0
0C4H Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
P4M P47M P46M P45M P44M P43M P42M P41M P40M
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
After reset 0 0 0 0 0 0 0 0
0C5H Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
P5M P57M P56M P55M P54M P53M P52M P51M P50M
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
After reset 0 0 0 0 0 0 0 0
Bit[7:0]
PnM[7:0]: Pn mode control bits. (n = 0~5).
0 = Pn is input mode.
1 = Pn is output mode.

Note:
1. Users can program them by bit control instructions (B0BSET, B0BCLR).
2. P0.2 is input only pin, and the P0M.2 keeps
“1”.

Example: I/O mode selecting
CLR P0M ; Set all ports to be input mode.
CLR P1M
CLR P5M
MOV A, #0FFH ; Set all ports to be output mode.
B0MOV P0M, A
B0MOV P1M, A
B0MOV P5M, A
B0BCLR P1M.2 ; Set P1.2 to be input mode.
B0BSET P1M.2 ; Set P1.2 to be output mode.