P87C51FB-4N NXP Semiconductors, P87C51FB-4N Datasheet - Page 5

• Manufacturer Part Number: P87C51FB-4N
• Description: MCU 8-Bit 87C 80C51 CISC 16KB EPROM 3.3V/5V 40-Pin PDIP Tube
• Manufacturer: NXP Semiconductors

Specifications of P87C51FB-4N

• Program Memory Size: 16 KB
• Package: 40PDIP
• Device Core: 80C51
• Family Name: 87C
• Maximum Speed: 16 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 32
• Interface Type: UART
• Number Of Timers: 3
• Ram Size: 256 Byte
• Program Memory Type: EPROM
• Operating Temperature: 0 to 70 °C
• Controller Family/series: (8051) 8052
• No. Of I/o's: 32
• Ram Memory Size: 265Byte
• Cpu Speed: 16MHz
• No. Of Timers: 3
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Oscillator Type: External Only

Philips Semiconductors
PIN DESCRIPTIONS
2000 Aug 07
V
V
P0.0–0.7
P1.0–P1.7
P2.0–P2.7
P3.0–P3.7
RST
ALE/PROG
MNEMONIC
SS
CC
80C51 8-bit microcontroller family
8K–64K/256–1K OTP/ROM/ROMless, low voltage (2.7V–5.5V),
low power, high speed (33 MHz)
39–32 43–36
21–28 24–31
10–17
DIP
1–8
20
40
10
11
12
13
14
15
16
17
30
1
2
3
4
5
6
7
8
9
PIN NUMBER
13–19
LCC
2–9
11,
22
44
13
14
15
16
17
18
19
10
33
11
2
3
4
5
6
7
8
9
40–44,
37–30
18–25
7–13
QFP
1–3
16
38
40
41
42
43
44
10
11
12
13
27
5,
1
2
3
5
7
8
9
4
TYPE NAME AND FUNCTION
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
during fetches from external program memory and during accesses to external data memory
also the program pulse input (PROG) during EPROM programming. ALE can be disabled by
Ground: 0 V reference.
Power Supply: This is the power supply voltage for normal, idle, and power-down operation.
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 received code bytes during EPROM
programming. External pull-ups are required during program verification.
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: I
during program memory verification.
Alternate functions for 8XC51FX and 8XC51RX+ Port 1 include:
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: I
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.
Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that have 1s
written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs,
port 3 pins that are externally being pulled low will source current because of the pull-ups.
(See DC Electrical Characteristics: I
family, as listed below:
Reset: A high on this pin for two machine cycles while the oscillator is running, resets the
device. An internal diffused resistor to V
capacitor to V
Address Latch Enable/Program Pulse: Output pulse for latching the low byte of the
address during an access to external memory. In normal operation, ALE is emitted at a
constant rate of 1/6 the oscillator frequency, and can be used for external timing or clocking.
Note that one ALE pulse is skipped during each access to external data memory. This pin is
setting SFR auxiliary.0. With this bit set, ALE will be active only during a MOVX instruction.
T2 (P1.0): Timer/Counter 2 external count input/Clockout (see Programmable Clock-Out)
T2EX (P1.1): Timer/Counter 2 Reload/Capture/Direction Control
ECI (P1.2): External Clock Input to the PCA
CEX0 (P1.3): Capture/Compare External I/O for PCA module 0
CEX1 (P1.4): Capture/Compare External I/O for PCA module 1
CEX2 (P1.5): Capture/Compare External I/O for PCA module 2
CEX3 (P1.6): Capture/Compare External I/O for PCA module 3
CEX4 (P1.7): Capture/Compare External I/O for PCA module 4
RxD (P3.0): Serial input port
TxD (P3.1): Serial output port
INT0 (P3.2): External interrupt
INT1 (P3.3): External interrupt
T0 (P3.4): Timer 0 external input
T1 (P3.5): Timer 1 external input
WR (P3.6): External data memory write strobe
RD (P3.7): External data memory read strobe
CC
.
5
IL
IL
). Port 1 also receives the low-order address byte
). Port 3 also serves the special features of the 80C51
SS
8XC51RA+/RB+/RC+/RD+/80C51RA+
permits a power-on reset using only an external
IL
). Port 2 emits the high-order address byte
8XC51FA/FB/FC/80C51FA
Product specification
8XC54/58