Datasheet

Section 8 I/O Ports
Rev. 4.00 Sep 27, 2006 page 220 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 9 • 8-bit I/O port P97/WAIT
I/O port also functioning as
expanded data bus control input
(WAIT)
I/O port
P96/φ/EXCL
When DDR =
0: input port or
EXCL input
When DDR =
1 (after reset):
φ output
When DDR = 0 (after reset): input port or EXCL
input
When DDR = 1: φ output
P95/AS/IOS
P94/HWR
P93/RD
Expanded data bus control
output(AS/IOS, HWR, RD)
I/O port
P92/IRQ0
P91/IRQ1
I/O port also functioning as external interrupt input (IRQ0, IRQ1)
P90/LWR/
IRQ2/ADTRG
I/O port also functioning as
expanded data bus control output
(LWR), external interrupt input
(IRQ2), and A/D converter external
trigger input (ADTRG)
I/O port also functioning as
external interrupt input
(IRQ2) and A/D converter
external trigger input
(ADTRG)
Port A • 8-bit I/O port PA7 to PA0/
A23 to A16/
KIN15 to KIN8/
CIN15 to CIN8
I/O port also
functioning as
key-sense
interrupt input
(KIN15 to
KIN8), and
expansion A/D
converter input
(CIN15 to
CIN8)
I/O port also
functioning as
address output (A23
to A16), key-sense
interrupt input
(KIN15 to KIN8),
and expansion A/D
converter input
(CIN15 to CIN8)
I/O port also functioning as
key-sense interrupt input
(KIN15 to KIN8) and
expansion A/D converter
input (CIN15 to CIN8)
Port B • 8-bit I/O port
PB7 to PB0/
D7 to D0
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