Port Control Register 1(Pcr1); Port Data Register 1(Pdr1) - Hitachi H8/3672 Series Hardware Manual

9.1.2

Port Control Register 1(PCR1)

PCR1 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 1.
Bit Bit Name Initial Value R/W
7 PCR17 0
6 PCR16 0
5 PCR15 0
4 PCR14 0
− −
3
2 PCR12 0
1
PCR11 0
0 PCR10 0
9.1.3

Port Data Register 1(PDR1)

PDR1 is a general I/O port data register of port 1.
Bit Bit Name Initial Value R/W
7 P17 0
6 P16 0
5 P15 0
4 P14 0
−
3 1
2 P12 0
1 P11 0
0
P10 0
Description
W When the corresponding pin is designated in PMR1 as a
general I/O pin, setting a PCR1 bit to 1 makes the
W
corresponding pin an output port, while clearing the bit to 0
W
makes the pin an input port.
W
Bit 3 is a reserved bit.
−
W
W
W
Description
R/W PDR1 stores output data for port 1 pins.
R/W If PDR1 is read while PCR1 bits are set to 1, the value
stored in PDR1 are read. If PDR1 is read while PCR1 bits
R/W
are cleared to 0, the pin states are read regardless of the
R/W
value stored in PDR1.
−
Bit 3 is a reserved bit. This bit is always read as 1 and
cannot be modified.
R/W
R/W
R/W
Rev. 1.0, 03/01, page 91 of 280