HD64F3670 Datasheet, PDF (128/323 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

9.4.1 Port Control Register 7 (PCR7)
PCR7 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 7.
Bit Bit Name Initial Value R/W
7


6 PCR76 0
W
5 PCR75 0
W
4 PCR74 0
W
3


2


1


0


Description
Reserved
Setting a PCR7 bit to 1 makes the corresponding pin an
output port, while clearing the bit to 0 makes the pin an
input port. Note that the TCSRV setting of the timer V has
priority for deciding input/output direction of the P76/TMOV
pin.
Reserved
9.4.2 Port Data Register 7 (PDR7)
PDR7 is a general I/O port data register of port 7.
Bit Bit Name Initial Value R/W
7
1

6 P76
0
R/W
5 P75
0
R/W
4 P74
0
R/W
3
1

2
1

1
1

0
1

Description
Reserved
This bit is always read as 1.
PDR7 stores output data for port 7 pins.
If PDR7 is read while PCR7 bits are set to 1, the value
stored in PDR7 is read. If PDR7 is read while PCR7 bits
are cleared to 0, the pin states are read regardless of the
value stored in PDR7.
Reserved
These bits are always read as 1.
Rev. 2.0, 03/02, page 104 of 298