VRS51L1050
Pin Descriptions for QFP-44/PLCC-44
T
ABLE
1: P
IN
D
ESCRIPTIONS FOR
QFP-44/PLCC-44
QFP
- 44
PLCC
- 44
Name
I/O
Function
QFP
- 44
PLCC
- 44
Name
I/O
Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
P1.5
SCL
P1.6
SDA
P1.7
RES
RXD
P3.0
P4.3
TXD
P3.1
#INT0
P3.2
#INT1
P3.3
T0
P3.4
T1
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
P2.5
A13
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
I
-
I/O
I/O
O
I/O
O
I/O
O
I/O
O
I/O
O
I/O
O
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
Bit 13 of External Memory Address
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
1
2
3
4
5
6
P2.6
A14
P2.7
A15
#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
P1.0
T2EX
P1.1
PWM0
P1.2
PWM1
P1.3
P1.4
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
-
I/O
I
I/O
I
I/O
I/O
O
I/O
I/O
Bit 6 of Port 2
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
External Access
Bit 7 Of Port 0
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
Data/Address Bit 3 of External Memory
Bit 2 of Port 0
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
Bit 2 of Port 4
Timer 2 Clock Out
Bit 0 of Port 1
Timer 2 Control
Bit 1 of Port 1
PWM Channel 0
Bit 2 of Port 1
PWM Channel 1
Bit 3 of Port 1
Bit 4 of Port 1
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
#EA
P4.1
ALE
#PSEN
P2.7/A15
P2.6/A14
P2.5/A13
P1.4
P1.3/PWM1
P1.2/PWM0
T2EX/P1.1
P0.2/AD2
VDD
P0.0/AD0
P0.1/AD1
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
VDD
P4.2
T2/P1.0
T2EX/P1.1
PWM0/P1.2
PWM1/P1.3
P1.4
33
34
23
22
P2.4/A12
P2.3/A11
P2.2/A10
P1.5
SCL/P1.6
SDA/P1.7
RES
RXD/P3.0
P4.3
TXD/P3.1
#INT0/P3.2
#INT1/P3.3
T0/P3.4
T1/P3.5
17
7
6
1
P0.3/AD3
40
T2/P1.0
P4.2
39
VRS51L1050
QFP-44
P2.1/A9
P2.0/A8
P4.0
VSS
XTAL1
XTAL2
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
#EA
P4.1
ALE
#PSEN
P2.7/A15
VRS51L1050
PLCC-44
44
1
12
11
#RD/P3.7
#WR/P3.6
29
18
28
P2.6/A14
P2.5/A13
P1.5
SCL/P1.6
SDA/P1.7
RES
RXD/P3.0
P4.3
TXD/P3.1
#INT0/P3.2
#INT1/P3.3
T0/P3.4
T1/P3.5
P2.1/A9
P2.2/A10
P2.3/A11
XTAL1
P2.0/A8
#WR/P3.6
#RD/P3.7
XTAL2
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P2.4/A12
VSS
P4.0
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
