ST72321M6 ST72321M9
I/O PORTS (Cont’d)
Table 11. I/O Port Register Map and Reset Values
Address
(Hex.)
Register
Label
7
6
5
4
3
2
1
0
Reset Value
of all I/O port registers
0
0
0
0
0
0
0
0
0000h PADR
0001h PADDR
MSB
LSB
0002h PAOR
0003h PBDR
0004h PBDDR
MSB
LSB
0005h PBOR
0006h PCDR
0007h PCDDR
MSB
LSB
0008h PCOR
0009h PDDR
000Ah PDDDR
MSB
LSB
000Bh PDOR
000Ch PEDR
000Dh PEDDR
MSB
LSB
000Eh PEOR
000Fh PFDR
0010h PFDDR
MSB
LSB
0011h PFOR
0012h PGDR
0013h PGDDR
MSB
LSB
0014h PGOR
0015h PHDR
0016h PHDDR
MSB
LSB
0017h PHOR
Related Documentation
AN 970: SPI Communication between ST7 and
EEPROM
AN1045: S/W implementation of I2C bus master
AN1048: Software LCD driver
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