hd64338342hw Renesas Electronics Corporation., hd64338342hw Datasheet - Page 262

• Manufacturer Part Number: hd64338342hw
• Description: Renesas 8-bit Single-chip Microcomputer H8 Family/h8/300l Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Section 8 I/O Ports
8.5
8.5.1
Port 4 is a 3-bit I/O port and 1-bit input port, configured as shown in figure 8.4.
8.5.2
Table 8.11 shows the port 4 register configuration.
Table 8.11 Port 4 Registers
Name
Port data register 4
Port control register 4
1. Port Data Register 4 (PDR4)
PDR4 is an 8-bit register that stores data for port 4 pins P4
bits are set to 1, the values stored in PDR4 are read, regardless of the actual pin states. If port 4 is
read while PCR4 bits are cleared to 0, the pin states are read.
Upon reset, PDR4 is initialized to H'F8.
Rev. 6.00 Aug 04, 2006 page 226 of 680
REJ09B0145-0600
Bit
Initial value
Read/Write
Port 4
Overview
Register Configuration and Description
—
—
7
1
Figure 8.4 Port 4 Pin Configuration
—
—
6
1
Port 4
Abbr.
PDR4
PCR4
—
—
5
1
—
—
4
1
R/W
R/W
W
P4
P4
P4
P4
2
3
2
1
0
P4
to P4
/IRQ
/TXD
/RXD
/SCK
R
3
1
3
0
0
32
32
32
. If port 4 is read while PCR4
Initial Value
H'F8
H'F8
R/W
P4
2
0
2
R/W
P4
1
0
1
Address
H'FFD7
H'FFE7
R/W
P4
0
0
0