Datasheet

Section 8 I/O Ports
Rev. 4.00 Sep 27, 2006 page 217 of 1130
REJ09B0327-0400
Expanded Modes Single-Chip Mode
Port Description Pins
Mode 1
Mode 2, Mode 3
(EXPE = 1)
Mode 2, Mode 3
(EXPE = 0)
Port B • 8-bit I/O port PB7/D7
PB6/D6
PB5/D5
PB4/D4
PB3/D3/CS4
PB2/D2/CS3
PB1/D1/HIRQ4
PB0/D0/HIRQ3
In 8-bit bus mode (ABW = 1): I/O
port
In 16-bit bus mode (ABW = 0): data
bus input/output (D7 to D0)
I/O port also functioning as
HIF control input/output
pins (CS3, CS4, HIRQ3,
HIRQ4)