Table of Contents
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Port
Description
•
Port 3
8-bit I/O port
•
MOS input pull-up option
•
Port 4
1-bit input internal port
•
3-bit I/O port
•
Port 5
8-bit I/O port
•
MOS input pull-up option
•
Port 6
8-bit I/O port
•
MOS input pull-up option
•
Port 7
8-bit I/O port
•
Port 8
8-bit I/O port
•
Port 9
4-bit I/O port
•
Port A
4-bit I/O port
•
Port B
8-bit input port
Notes: 1. Internal I/O port for interfacing to the FLEX™ decoder.
2. Internal input port for interfacing to the FLEX™ decoder.
134
Pins and
Functions
Other Functions
P3
SCI31 data output (TXD
7
P3
data input (RXD
6
P3
/TXD
input/output (SCK
5
31
P3
/RXD
4
31
P3
/SCK
3
31
P3
/RESO
Reset output, timer C count-
2
P3
/UD
up/down select input
1
P3
0
2
P4
/IRQ
*
Internal IRQ interrupt 0
3
0
P4
/TXD
SCI32 data output (TXD
2
32
P4
/RXD
data input (RXD
1
32
P4
/SCK
input/output (SCK
0
32
P5
to P5
/
Wakeup input (WKP
7
0
WKP
to WKP
WKP
7
0
P6
to P6
7
0
P7
to P7
7
0
P8
to P8
7
0
P9
to P9
3
0
PA
to PA
3
0
PB
to PB
/
A/D converter analog input
7
0
AN
to AN
7
0
),
31
), clock
31
)
31
),
32
), clock
32
)
32
to
7
)
0
Function
Switching
Registers
PMR3
SCR31
SMR31
PMR3
PMR3
SCR32
SMR32
PMR5
AMR
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