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S87L51FA-4N40 Datasheet(PDF) 4 Page - NXP Semiconductors

Part # S87L51FA-4N40
Description  CMOS single-chip 3.0V 8-bit microcontrollers
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

S87L51FA-4N40 Datasheet(HTML) 4 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
87L51FA/87L51FB
CMOS single-chip 3.0V 8-bit microcontrollers
1996 Aug 16
3-153
CERAMIC AND PLASTIC LEADED CHIP CARRIER
PIN FUNCTIONS
LCC
61
40
7
17
39
29
18
28
Pin
Function
1
NC*
2
P1.0/T2
3
P1.1/T2EX
4
P1.2/ECI
5
P1.3/CEX0
6
P1.4/CEX1
7
P1.5/CEX2
8
P1.6/CEX3
9
P1.7/CEX4
10
RST
11
P3.0/RxD
12
NC*
13
P3.1/TxD
14
P3.2/INT0
15
P3.3/INT1
Pin
Function
16
P3.4/T0
17
P3.5/T1
18
P3.6/WR
19
P3.7/RD
20
XTAL2
21
XTAL1
22
VSS
23
NC*
24
P2.0/A8
25
P2.1/A9
26
P2.2/A10
27
P2.3/A11
28
P2.4/A12
29
P2.5/A13
30
P2.6/A14
Pin
Function
31
P2.7/A15
32
PSEN
33
ALE/PROG
34
NC*
35
EA/VPP
36
P0.7/AD7
37
P0.6/AD6
38
P0.5/AD5
39
P0.4/AD4
40
P0.3/AD3
41
P0.2/AD2
42
P0.1/AD1
43
P0.0/AD0
44
VCC
SU00023
* DO NOT CONNECT
PLASTIC QUAD FLAT PACK
PIN FUNCTIONS
PQFP
44
34
1
11
33
23
12
22
Pin
Function
1
P1.5/CEX2
2
P1.6/CEX3
3
P1.7/CEX4
4
RST
5
P3.0/RxD
6
NC*
7
P3.1/TxD
8
P3.2/INT0
9
P3.3/INT1
10
P3.4/T0
11
P3.5/T1
12
P3.6/WR
13
P3.7/RD
14
XTAL2
15
XTAL1
Pin
Function
16
VSS
17
NC*
18
P2.0/A8
19
P2.1/A9
20
P2.2/A10
21
P2.3/A11
22
P2.4/A12
23
P2.5/A13
24
P2.6/A14
25
P2.7/A15
26
PSEN
27
ALE/PROG
28
NC*
29
EA/VPP
30
P0.7/AD7
Pin
Function
31
P0.6/AD6
32
P0.5/AD5
33
P0.4/AD4
34
P0.3/AD3
35
P0.2/AD2
36
P0.1/AD1
37
P0.0/AD0
38
VCC
39
NC*
40
P1.0/T2
41
P1.1/T2EX
42
P1.2/ECI
43
P1.3/CEX0
44
P1.4/CEX1
SU00024
* DO NOT CONNECT
PIN DESCRIPTIONS
PIN NUMBER
MNEMONIC
DIP
LCC
QFP
TYPE
NAME AND FUNCTION
VSS
20
22
16
I
Ground: 0V reference.
VCC
40
44
38
I
Power Supply: This is the power supply voltage for normal, idle, and power-down operation.
P0.0–0.7
39–32
43–36
37–30
I/O
Port 0: Port 0 is an open-drain, bidirectional I/O port. Port 0 pins that have 1s written to
them float and can be used as high-impedance inputs. Port 0 is also the multiplexed
low-order address and data bus during accesses to external program and data memory. In
this application, it uses strong internal pull-ups when emitting 1s. Port 0 also outputs the
code bytes during program verification and receives code bytes during EPROM
programming. External pull-ups are required during program verification.
P1.0–P1.7
1–8
2–9
40–44,
1–3
I/O
Port 1: Port 1 is an 8-bit bidirectional I/O port with internal pull-ups. Port 1 pins that have 1s
written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs,
port 1 pins that are externally pulled low will source current because of the internal pull-ups.
(See DC Electrical Characteristics: IIL). Port 1 also receives the low-order address byte
during program memory verification. Alternate functions include:
1
2
40
I
T2 (P1.0): Timer/Counter 2 external count input/Clockout
2
3
41
I
T2EX (P1.1): Timer/Counter 2 Reload/Capture/Direction Control
3
4
42
I
ECI (P1.2): External Clock Input to the PCA
4
5
43
I/O
CEX0 (P1.3): Capture/Compare External I/O for PCA module 0
5
6
44
I/O
CEX1 (P1.4): Capture/Compare External I/O for PCA module 1
6
7
1
I/O
CEX2 (P1.5): Capture/Compare External I/O for PCA module 2
7
8
2
I/O
CEX3 (P1.6): Capture/Compare External I/O for PCA module 3
8
9
3
I/O
CEX4 (P1.7): Capture/Compare External I/O for PCA module 4
P2.0–P2.7
21–28
24–31
18–25
I/O
Port 2: Port 2 is an 8-bit bidirectional I/O port with internal pull-ups. Port 2 pins that have 1s
written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs,
port 2 pins that are externally being pulled low will source current because of the internal
pull-ups. (See DC Electrical Characteristics: IIL). Port 2 emits the high-order address byte
during fetches from external program memory and during accesses to external data memory
that use 16-bit addresses (MOVX @DPTR). In this application, it uses strong internal
pull-ups when emitting 1s. During accesses to external data memory that use 8-bit addresses
(MOV @Ri), port 2 emits the contents of the P2 special function register. Some Port 2 pins
receive the high order address bits during EPROM programming and verification.


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