HD6432351 Datasheet, PDF (361/989 Pages) Renesas Technology Corp – The H8S/2000 CPU has an internal 32-bit architecture, is provided with sixteen 16-bit general registers and a concise

9.4 Port 3
9.4.1 Overview
Port 3 is a 6-bit I/O port. Port 3 pins also function as SCI I/O pins (TxD0, RxD0, SCK0, TxD1,
RxD1, and SCK1). Port 3 pin functions are the same in all operating modes.
Figure 9-3 shows the port 3 pin configuration.
Port 3 pins
Port 3
P3₅ (I/O)/SCK1 (I/O)
P3₄ (I/O)/SCK0 (I/O)
P3₃ (I/O)/RxD1 (input)
P3₂ (I/O)/RxD0 (input)
P3₁ (I/O)/TxD1 (output)
P3₀ (I/O)/TxD0 (output)
Figure 9-3 Port 3 Pin Functions
9.4.2 Register Configuration
Table 9-6 shows the port 3 register configuration.
Table 9-6 Port 3 Registers
Name
Abbreviation R/W
Port 3 data direction register
P3DDR
W
Port 3 data register
P3DR
R/W
Port 3 register
PORT3
R
Port 3 open drain control register P3ODR
R/W
Notes: 1. Lower 16 bits of the address.
2. Value of bits 5 to 0.
Initial Value*²
H'00
H'00
Undefined
H'00
Address*¹
H'FEB2
H'FF62
H'FF52
H'FF76
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