HD6473837H Datasheet, PDF (169/562 Pages) Renesas Technology Corp – Hardware Manual

8.5 Port 4
8.5.1 Overview
Port 4 consists of a 3-bit I/O port and a 1-bit input port, and is configured as shown in figure 8.4.
Port 4
P4₃/IRQ ₀
P4 ₂ /TXD
P4 ₁ /RXD
P4 ₀ /SCK ₃
Figure 8.4 Port 4 Pin Configuration
8.5.2 Register Configuration and Description
Table 8.11 shows the port 4 register configuration.
Table 8.11 Port 4 Registers
Name
Port data register 4
Port control register 4
Abbrev.
R/W
PDR4
R/W
PCR4
W
Initial Value
H'F8
H'F8
Address
H'FFD7
H'FFE7
152