
267
Port
Description
Pins
Modes 4 and 5
Mode 6
Mode 7
Port 7
8-bit I/O port P77
P76/EXMSTP
P75/
EXMS
P74/
MRES/EXDTCE
P73/
TEND1/CS7
P72/
TEND0/CS6
P71/
DREQ1/CS5
P70/
DREQ0/CS4
8-bit I/O port also functioning as DMAC
I/O pins (
DREQ0, TEND0, DREQ1,
TEND1), bus control output pins (CS4
to
CS7), the manual reset input pin
(
MRES), and external module output
pins (EXMSTP,
EXMS, EXDTCE)
8-bit I/O port also
functioning as
DMAC I/O pins
(
DREQ0, TEND0,
DREQ1, TEND1),
the manual reset
input pins
(
MRES), and
external module
output pin
(EXMSTP,
EXMS,
EXDTCE)
Port 9
1-bit input
port
P96/DA0
1-bit input port also functioning as D/A analog output pin
(D/A0)
Port A
4-bit I/O port
Built-in MOS
input pull-up
Open-drain
output
capability
PA3/A19/SCK2
PA2/A18/RxD2
PA1/A17/TxD2
PA0/A16
I/O port also functioning as SCI
(channel 2) I/O pins (TxD2, RxD2,
SCK2) and address output (A16 to A19)
I/O port also
functioning as SCI
(channel 2) I/O
pins (TxD2, RxD2,
SCK2)
Port B
8-bit I/O port
Built-in MOS
input pull-up
PB7/A15
PB6/A14
PB5/A13
PB4/A12
PB3/A11
PB2/A10
PB1/A9
PB0/A8
I/O port also functioning as address
output (A8 to A15)
I/O port
Port C
8-bit I/O port
Built-in MOS
input pull-up
PC7/A7–PC0/A0
Address output
(A0 to A7)
When DDR = 0:
Input port
When DDR = 1:
Address output
I/O port
Port D
8-bit I/O port
Built-in MOS
input pull-up
PD7/D15–PD0/D8
Data bus input/output
I/O port
Port E
8-bit I/O port
Built-in MOS
input pull-up
PE7/D7–PE0/D0
8-bit bus mode: I/O port
16-bit bus mode: Data bus input/output
I/O port