HD64F2149 Datasheet, PDF (246/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

8.5 Port 4
8.5.1 Overview
Port 4 is an 8-bit I/O port. Port 4 pins also function as 14-bit PWM output pins (PWX1, PWX0),
8-bit timer 0 and 1 (TMR0, TMR1) I/O pins (TMCI0, TMRI0, TMO0, TMCI1, TMRI1, TMO1),
timer connection I/O pins (CSYNCI, HSYNCI, HSYNCO), SCI2 I/O pins (TxD2, RxD2, SCK2),
IrDA interface I/O pins (IrTxD, IrRxD), host interface (XBS) output pins (HIRQ12, HIRQ1,
HIRQ11), and the IIC1 I/O pin (SDA1). Port 4 pin functions are the same in all operating modes.
Figure 8.12 shows the port 4 pin configuration.
Port 4
Port 4 pins
P47 (I/O)/PWX1 (Output)
P46 (I/O)/PWX0 (Output)
P45 (I/O)/TMRI1 (Input)/HIRQ12 (Output)/CSYNCI (Input)
P44 (I/O)/TMO1 (Output)/HIRQ1 (Output)/HSYNCO (Output)
P43 (I/O)/TMCI1 (Input)/HIRQ11 (Output)/HCYNCI (Input)
P42 (I/O)/TMRI0 (Input)/SCK2 (I/O)/SDA1 (I/O)
P41 (I/O)/TMO0 (Output)/RxD2 (Input)/IrRxD (Input)
P40 (I/O)/TMCI0 (Input)/TxD2 (Output)/IrTxD (Output)
Figure 8.12 Port 4 Pin Functions
8.5.2 Register Configuration
Table 8.8 shows the port 4 register configuration.
Table 8.8 Port 4 Registers
Name
Abbreviation R/W
Port 4 data direction register P4DDR
W
Port 4 data register
P4DR
R/W
Note: * Lower 16 bits of the address.
Initial Value
H'00
H'00
Address*
H'FFB5
H'FFB7
212