Datasheet

Section 8 I/O Ports
Rev. 4.00 Sep 27, 2006 page 213 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 P92/IRQ0
P91/IRQ1
I/O port also functioning as external interrupt input (IRQ0, IRQ1)
P90/LWR/IRQ2/
ADTRG/ECS2
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), A/D converter
external trigger input
(ADTRG), and host
interface control input
(ECS2)
Port A • 8-bit I/O port PA7/A23/KIN15/
CIN15/PS2CD
PA6/A22/KIN14/
CIN14/PS2CC
PA5/A21/KIN13/
CIN13/PS2BD
PA4/A20/KIN12/
CIN12/PS2BC
PA3/A19/KIN11/
CIN11/PS2AD
PA2/A18/KIN10/
CIN10/PS2AC
PA1/A17/KIN9/
CIN9
PA0/A16/KIN8/
CIN8
I/O port also
functioning as
key-sense
interrupt input
(KIN15 to
KIN8),
expansion A/D
converter input
(CIN15 to
CIN8), and
keyboard
buffer
controller
input/output
(PS2CD,
PS2CC,
PS2BD,
PS2BC,
PS2AD,
PS2AC)
I/O port also
functioning as
address output (A23
to A16), key-sense
interrupt input
(KIN15 to KIN8),
expansion A/D
converter input
(CIN15 to CIN8),
and keyboard buffer
controller input/
output (PS2CD,
PS2CC, PS2BD,
PS2BC, PS2AD,
PS2AC)
I/O port also functioning as
key-sense interrupt input
(KIN15 to KIN8),
expansion A/D converter
input (CIN15 to CIN8), and
keyboard buffer controller
input/output (PS2CD,
PS2CC, PS2BD, PS2BC,
PS2AD, PS2AC)
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)