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Table 1-3 Pin Functions (cont)
Type
Serial com-
munication
interface (SCI)
A/D
converter
I/O ports
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Elcodis.com
electronic components distributor
Symbol
Pin No.
I/O
TxD
9
Output Transmit data: SCI data output
RxD
10
Input
SCK
11
Input/
output
AN
to AN
66 to 59
Input
7
0
ADTRG
8
Input
AV
68
Input
CC
AV
58
Input
SS
V
67
Input
REF
P1
to P1
29 to 22
Input/
7
0
output
P2
to P2
38 to 31
Input/
7
0
output
P3
to P3
20 to 13
Input/
7
0
output
P5
to P5
42 to 39
Input/
3
0
output
P6
to P6
, 56 to 54,
Input/
5
3
P6
43
output
0
P7
to P7
66 to 59
Input
7
0
P8
to P8
72 to 69
Input/
3
0
output
Name and Function
Receive data: SCI data input
Serial clock: SCI clock input/output
Analog 7 to 0: Analog input pins
A/D trigger: External trigger input for starting
A/D conversion
Power supply pin for the A/D converter.
Connect to the system power supply (+5 V)
when not using the A/D converter.
Ground pin for the A/D converter. Connect to
system ground (0 V) when not using the A/D
converter.
Reference voltage input pin for the A/D
converter. Connect to the system power supply
(+5 V) when not using the A/D converter.
Port 1: Eight input/output pins. The direction
of each pin can be selected in the port 1 data
direction register (P1DDR).
Port 2: Eight input/output pins. The direction
of each pin can be selected in the port 2 data
direction register (P2DDR).
Port 3: Eight input/output pins. The direction
of each pin can be selected in the port 3 data
direction register (P3DDR).
Port 5: Four input/output pins. The direction of
each pin can be selected in the port 5 data
direction register (P5DDR).
Port 6: Four input/output pins. The direction
of each pin can be selected in the port 6 data
direction register (P6DDR).
Port 7: Eight input pins
Port 8: Four input/output pins. The direction of
each pin can be selected in the port 8 data
direction register (P8DDR).
12
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