HD64F3687HV Datasheet, PDF (153/538 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

9.3 Port 3
Port 3 is a general I/O port. Each pin of the port 3 is shown in figure 9.3.
Section 9 I/O Ports
P37
P36
P35
Port 3
P34
P33
P32
P31
P30
Figure 9.3 Port 3 Pin Configuration
Port 3 has the following registers.
• Port control register 3 (PCR3)
• Port data register 3 (PDR3)
9.3.1 Port Control Register 3 (PCR3)
PCR3 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 3.
Initial
Bit
Bit Name Value R/W Description
7
PCR37 0
6
PCR36 0
5
PCR35 0
W
Setting a PCR3 bit to 1 makes the corresponding pin an
W
output port, while clearing the bit to 0 makes the pin an
input port.
W
4
PCR34 0
W
3
PCR33 0
W
2
PCR32 0
W
1
PCR31 0
W
0
PCR30 0
W
Rev.5.00 Nov. 02, 2005 Page 119 of 500
REJ09B0027-0500