HD64F2149 Datasheet, PDF (263/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

8.9 Port 8
8.9.1 Overview
Port 8 is an 8-bit I/O port. Port 8 pins also function as SCI1 I/O pins (TxD1, RxD1, SCK1), the
IIC1 I/O pin (SCL1), host interface (XBS) I/O pins (CS2, GA20, HA0, HIFSD), host interface
(LPC) I/O pins (PME, GA20, CLKRUN, LPCPD), and interrupt input pins (IRQ5 to IRQ3). Port 8
pin functions are the same in all operating modes except host interface function. Figure 8.16
shows the port 8 pin configuration.
Port 8
Port 8 pins
P86 (I/O)/IRQ5 (Input)/SCK1 (I/O)/SCL1 (I/O)
P85 (I/O)/IRQ4 (Input)/RxD1 (Input)
P84 (I/O)/IRQ3 (Input)/TxD1 (Output)
P83 (I/O)/LPCPD (Input)
P82 (I/O)/HIFSD (Input)/CLKRUN (I/O)
P81 (I/O)/CS2 (Input)/GA20 (I/O)
P80 (I/O)/HA0 (Input)/PME (I/O)
Figure 8.16 Port 8 Pin Functions
8.9.2 Register Configuration
Table 8.16 summarizes the port 8 registers.
Table 8.16 Port 8 Registers
Name
Abbreviation R/W
Port 8 data direction register P8DDR
W
Port 8 data register
P8DR
R/W
Notes: 1. Lower 16 bits of the address.
2. P8DDR has the same address as PBPIN.
Initial Value
H'80
H'80
Address^*1
H'FFBD*²
H'FFBF
229