HD64F36024FX Datasheet, PDF (140/386 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

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. 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
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.
Bit
7 to 5
4
3
2
1
0
Initial
Bit Name Value


PCR84 0
PCR83 0
PCR82 0
PCR81 0
PCR80 0
R/W

W
W
W
W
W
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.
Rev. 4.00 Sep. 23, 2005 Page 112 of 354
REJ09B0025-0400