HD6433937 Datasheet, PDF (160/521 Pages) Hitachi Semiconductor – Hardware Manual

8.4 Port 3
8.4.1 Overview
Port 3 is an 8-bit I/O port, configured as shown in figure 8-3.
Port 3
P3 ₇
P3 ₆
P3 ₅ /TXD₃₁
P3 ₄ /RXD₃₁
P3₃/SCK ₃₁
P3 ₂ /RESO
P3 ₁ /UD
P3 ₀
Figure 8-3 Port 3 Pin Configuration
8.4.2 Register Configuration and Description
Table 8-8 shows the port 3 register configuration.
Table 8-8 Port 3 Registers
Name
Port data register 3
Port control register 3
Port pull-up control register 3
Port mode register 3
Abbrev. R/W
PDR3
R/W
PCR3
W
PUCR3
R/W
PMR3
R/W
Initial Value
H'00
H'00
H'00
H'04
Address
H'FFD6
H'FFE6
H'FFE1
H'FFCA
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