HD64F3694HV Datasheet, PDF (156/452 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

Section 9 I/O Ports
9.5 Port 8
Port 8 is a general I/O port also functioning as a timer W I/O pin. Each pin of the port 8 is shown
in figure 9.5. The register setting of the timer W has priority for functions of the pins P84/FTIOD,
P83/FTIOC, P82/FTIOB, and P81/FTIOA. P80/FTCI also functions as a timer W input port that is
connected to the timer W regardless of the register setting of port 8.
Port 8
P87
P86
P85
P84/FTIOD
P83/FTIOC
P82/FTIOB
P81/FTIOA
P80/FTCI
Figure 9.5 Port 8 Pin Configuration
Port 8 has the following registers.
• Port control register 8 (PCR8)
• Port data register 8 (PDR8)
9.5.1 Port Control Register 8 (PCR8)
PCR8 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 8.
Initial
Bit
Bit Name Value R/W Description
7
PCR87 0
6
PCR86 0
5
PCR85 0
4
PCR84 0
W
When each of the port 8 pins P87 to P80 functions as an
W
general I/O port, setting a PCR8 bit to 1 makes the
corresponding pin an output port, while clearing the bit to
W
0 makes the pin an input port.
W
3
PCR83 0
W
2
PCR82 0
W
1
PCR81 0
W
0
PCR80 0
W
Rev.5.00 Nov. 02, 2005 Page 126 of 418
REJ09B0028-0500