SONIX SN8P27411, User Manual

Page: 71 / 136

SN8P2740 Series
ADC, OP-amp, Comparator 8-Bit Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 71
Version 2.0
7.4 I/O PORT DATA REGISTER
0D0H Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
P0 - P06 P05 P04 P03 P02 P01 P00
Read/Write - R/W R/W R R/W R/W W R/W
After reset - 0 0 0 0 0 0 0
0D1H Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
P1 - P16 P15 P14 P13 P12 P11 P10
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
0D4H Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
P4 P47 P46 P45 P44 P43 P42 P41 P40
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

Note:
1. The P04 keeps
“1” when external reset enable by code option.
2. If set one bit of P0 register (P0.n bit), recommend using
“MOV” or “B0MOV” instructions to
control the bit, not use
“read & modify write” type instructions (e.g. bset, bclr, b0bset,
b0bclr
…), or the write only type bit (P0.1) is modified after executing instruction.

Example: Read data from input port.
B0MOV A, P0 ; Read data from Port 0
B0MOV A, P4 ; Read data from Port 4

Example: Write data to output port.
MOV A, #0FFH ; Write data FFH to all Port.
B0MOV P0, A
B0MOV P4, A

Example: Write one bit data to output port.
B0BSET P4.0 ; Set P4.0 to be
“1”.
B0BCLR P4.0 ; Set P4.0 to be
“0”.