VRS51L1050
Pin Descriptions for QFP-44/PLCC-44
TABLE 1: PIN DESCRIPTIONS FOR QFP-44/PLCC-44
QFP
- 44
1
PLCC
- 44
7
QFP
- 44
PLCC
- 44
Name
P1.5
I/O
Function
Bit 5 of Port 1
I²C SCL
Bit 6 of Port 1
I²C SDA
Bit 7 of Port 1
Reset
Receive Data
Bit 0 of Port 3
Bit 3 of Port 4
Transmit Data &
Bit 1 of Port 3
External Interrupt 0
Bit 2 of Port 3
External Interrupt 1
Bit 3 of Port 3
Timer 0
Bit 4 of Port 3
Timer 1 & 3
Bit 5 of Port
Ext. Memory Write
Bit 6 of Port 3
Ext. Memory Read
Bit 7 of Port 3
Oscillator/Crystal Output
Oscillator/Crystal In
Ground
Bit 0 of Port 4
Bit 0 of Port 2
Bit 8 of External Memory Address
Bit 1 of Port 2
Bit 9 of External Memory Address
Bit 2 of Port 2
Bit 10 of External Memory Address
Bit 3 of Port 2 &
Bit 11 of External Memory Address
Bit 4 of Port 2
Bit 12 of External Memory Address
Bit 5 of Port 2
Name
P2.6
A14
P2.7
A15
I/O
I/O
O
I/O
O
O
O
I/O
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
-
Function
I/O
O
I/O
O
I/O
I
I
I/O
I/O
O
I/O
I
I/O
I
I/O
I
I/O
I
I/O
O
I/O
O
I/O
O
Bit 6 of Port 2
24
25
30
31
SCL
P1.6
SDA
P1.7
RES
RXD
P3.0
P4.3
TXD
P3.1
#INT0
P3.2
#INT1
P3.3
T0
Bit 14 of External Memory Address
Bit 7 of Port 2
Bit 15 of External Memory Address
Program Store Enable
Address Latch Enable
Bit 1 of Port 4
2
8
3
4
5
6
7
9
26
27
28
29
32
33
34
35
#PSEN
ALE
P4.1
#EA
P0.7
AD7
P0.6
AD6
P0.5
AD5
P0.4
AD4
P0.3
AD3
P0.2
AD2
P0. 1
AD1
P0.0
AD0
VDD
P4.2
T2
10
11
12
13
External Access
Bit 7 Of Port 0
30
31
32
33
34
35
36
37
36
37
38
39
40
41
42
43
Data/Address Bit 7 of External Memory
Bit 6 of Port 0
Data/Address Bit 6 of External Memory
Bit 5 of Port 0
Data/Address Bit 5 of External Memory
Bit 4 of Port 0
Data/Address Bit 4 of External Memory
Bit 3 Of Port 0
8
14
15
16
17
18
19
9
10
11
12
13
P3.4
T1
Data/Address Bit 3 of External Memory
Bit 2 of Port 0
P3.5
#WR
P3.6
#RD
P3.7
XTAL2
XTAL1
VSS
P4.0
P2.0
A8
P2.1
A9
P2.2
A10
P2.3
A11
P2.4
A12
Data/Address Bit 2 of External Memory
Bit 1 of Port 0 & Data
Address Bit 1 of External Memory
Bit 0 Of Port 0 & Data
Address Bit 0 of External Memory
VCC
14
15
16
17
20
21
22
23
I
-
38
39
44
1
I/O
I
I/O
I
Bit 2 of Port 4
I/O
I/O
O
I/O
O
I/O
O
I/O
O
I/O
O
I/O
O
Timer 2 Clock Out
40
41
42
2
3
4
P1.0
T2EX
P1.1
PWM0
P1.2
Bit 0 of Port 1
18
19
20
21
22
23
24
25
26
27
28
29
Timer 2 Control
I/O
Bit 1 of Port 1
PWM Channel 0
I/O
O
Bit 2 of Port 1
PWM1
P1.3
PWM Channel 1
Bit 3 of Port 1
Bit 4 of Port 1
43
44
5
6
I/O
I/O
P1.4
P2.5
A13
Bit 13 of External Memory Address
33
34
23
22
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
VDD
P2.4/A12
P2.3/A11
P2.2/A10
P2.1/A9
P2.0/A8
P4.0
6
1
40
7
39
P1.5
P0.4/AD4
P0.5/AD5
P0.6/AD6
SCL/P1.6
SDA/P1.7
RES
VRS51L1050
QFP-44
P0.7/AD7
#EA
RXD/P3.0
P4.3
VRS51L1050
PLCC-44
P4.2
P4.1
T2/P1.0
T2EX/P1.1
VSS
TXD/P3.1
#INT0/P3.2
#INT1/P3.3
T0/P3.4
ALE
XTAL1
#PSEN
P2.7/A15
P2.6/A14
P2.5/A13
PWM0/P1.2
PWM1/P1.3
P1.4
XTAL2
#RD/P3.7
#WR/P3.6
44
1
12
11
T1/P3.5
17
29
28
18
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