HD64F3670 RENESAS [Renesas Technology Corp], HD64F3670 Datasheet - Page 130

• Manufacturer Part Number: HD64F3670
• Description: Hitachi Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

9.5
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. The P80/FTCI pin 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 has the following registers.
9.5.1
PCR8 selects inputs/outputs in bit units for pins to be used as general I/O ports of port 8.
Bit Bit Name
7
6
5
4
3
2
1
0
Rev. 2.0, 03/02, page 106 of 298
Port control register 8 (PCR8)
Port data register 8 (PDR8)
PCR84
PCR83
PCR82
PCR81
PCR80
Port 8
Port Control Register 8 (PCR8)
Initial Value R/W
0
0
0
0
0
Figure 9.5 Port 8 Pin Configuration
W
W
W
W
W
Port 8
Description
Reserved
When each of the port 8 pins P84 to P80 functions as an
general I/O port, setting a PCR8 bit to 1 makes the
corresponding pin an output port, while clearing the bit to 0
makes the pin an input port.
P84/FTIOD
P83/FTIOC
P82/FTIOB
P81/FTIOA
P80/FTCI