VRS51C1000
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
PWM2
P1.5
PWM3
P1.6
PWM4
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
O
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
PWM Channel 2
Bit 5 of Port 1
PWM Channel 3
Bit 6 of Port 1
PWM Channel 4
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
P1.2
PWM0
P1.3
PWM1
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
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
Bit 2 of Port 1
PWM Channel 0
Bit 3 of Port 1
PWM Channel 1
Bit 4 of Port 1
PWM1/P1.4
PWM1/P1.4
PWM0/P1.3
P1.2
T2EX/P1.1
PWM0/P1.3
P1.2
T2EX/P1.1
P0.2/AD2
VDD
P0.0/AD0
P0.1/AD1
VDD
P0.0/AD0
P0.1/AD1
P0.2/AD2
P0.3/AD3
T2/P1.0
P4.2
6
5
4
3
2
PWM2/P1.5
PWM3/P1.6
PWM4/P1.7
RES
RXD/P3.0
P4.3
TXD/P3.1
#INT0/P3.2
#INT1/P3.3
T0/P3.4
T1/P3.5
7
8
9
10
11
12
13
14
15
16
17
1 44 43 42 41 40
39
38
37
36
6
5
4
3
2
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
PWM2/P1.5
PWM3/P1.6
PWM4/P1.7
RES
RXD/P3.0
P4.3
TXD/P3.1
#INT0/P3.2
#INT1/P3.3
T0/P3.4
T1/P3.5
7
8
9
10
11
12
13
14
15
16
17
1 44 43 42 41 40
39
38
37
36
P0.3/AD3
T2/P1.0
P4.2
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
VRS51C1000
PLCC-44
35
34
33
32
31
30
29
VRS51C1000
PLCC-44
35
34
33
32
31
30
29
18 19 20 21 22 23 24 25 26 27 28
18 19 20 21 22 23 24 25 26 27 28
P2.1/A9
P2.2/A10
P2.3/A11
XTAL1
P2.0/A8
#WR/P3.6
#RD/P3.7
XTAL2
P2.1/A9
P2.2/A10
P2.3/A11
#WR/P3.6
#RD/P3.7
XTAL2
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page 2 of 48
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P2.4/A12
P2.4/A12
XTAL1
P2.0/A8
VSS
P4.0
VSS
P4.0
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
