13 Port G; 13.1 Overview - Renesas H8S/2633 Series Hardware Manual

Pin Selection Method and Pin Functions
PF0/BREQ/IRQ2 The pin function is switched as shown below according to the combination of
the operating mode, and bits BRLE and PF0DDR.
Operating
Mode
BRLE
PF0DDR
Pin function
10A.13 Port G
10A.13.1 Overview
Port G is a 5-bit I/O port and also used as external interrupt input pins (IRQ6 and IRQ7) and bus
control signal output pins (CS0 to CS3, CAS, and OE).
Figure 10A-23 shows the configuration of port G pins.
Port G pin
PG4 /
PG3 /
Port G
PG2 /
PG1 /
PG0 /
0
PF0
input pin
CS0
CS1
CS2
CS3 / OE / IRQ7
CAS / IRQ6
Figure 10A-23 Port G Pin Functions
Modes 4 to 6
0 1
1 —
BREQ
PF0
output pin input pin
IRQ2 input pin
Pin Functions in Modes 4 to 6
CS0 (output)
PG4 (input) /
CS1 (output)
PG3 (input) /
CS2 (output)
PG2 (input) /
CS3 (output) / OE (output) / IRQ7 (input)
PG1 (input) /
(I/O) / CAS (output) / IRQ6 (input)
PG0
Pin Functions in Mode 7
PG4 (I/O)
PG3 (I/O)
PG2 (I/O)
(I/O) / IRQ7 (input)
PG1
(I/O) / IRQ6 (input)
PG0
Mode 7
—
0 1
PF0 PF0
input pin output pin
431