SN8P1600
8-bit micro-controller
I/O PORT MODE
The port direction is programmed by PnM register. Port 0 is always input mode. Port 1 and Port 2 can select input or
output direction. The each bit of PnM is set to “0”, the I/O pin is input mode. The each bit of PnM is set to “1”, the I/O
pin is output mode.
ꢂ
SN8P1602/1603
0C1H
P1M
Bit 7
Bit 6
0
-
Bit 5
0
-
Bit 4
P14M
R/W
0
Bit 3
P13M
R/W
0
Bit 2
P12M
R/W
0
Bit 1
P11M
R/W
0
Bit 0
P10M
R/W
0
0
-
-
Read/Write
After reset
-
-
ꢂ
SN8P1604
0C1H
P1M
Bit 7
P17M
R/W
0
Bit 6
P16M
R/W
0
Bit 5
P15M
R/W
0
Bit 4
P14M
R/W
0
Bit 3
P13M
R/W
0
Bit 2
P12M
R/W
0
Bit 1
P11M
R/W
0
Bit 0
P10M
R/W
0
Read/Write
After reset
ꢂ
SN8P1602/1603/1604
0C2H
P2M
Bit 7
P27M
R/W
0
Bit 6
P26M
R/W
0
Bit 5
P25M
R/W
0
Bit 4
P24M
R/W
0
Bit 3
P23M
R/W
0
Bit 2
P22M
R/W
0
Bit 1
P21M
R/W
0
Bit 0
P20M
R/W
0
Read/Write
After reset
ꢂ
SN8P1604
0C5H
P5M
Bit 7
0
-
Bit 6
0
-
Bit 5
0
-
Bit 4
0
-
Bit 3
P53M
R/W
0
Bit 2
P52M
R/W
0
Bit 1
P51M
R/W
0
Bit 0
P50M
R/W
0
Read/Write
After reset
-
-
-
-
ꢂ
The PnM registers are read/write bi-direction registers. Users can program them by bit control
instructions (B0BSET, B0BCLR).
ꢃ
Example: I/O mode selecting.
CLR
CLR
P1M
P2M
; Set all ports to be input mode.
; Set all ports to be output mode.
MOV
B0MOV
B0MOV
A, #0FFH
P1M, A
P2M, A
B0BCLR
B0BSET
P1M.2
P1M.2
; Set P1.2 to be input mode.
; Set P1.2 to be output mode.
SONiX TECHNOLOGY CO., LTD
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