P87C52 PHILIPS [NXP Semiconductors], P87C52 Datasheet - Page 3

• Manufacturer Part Number: P87C52
• Description: 80C51 8-bit microcontrollers 16K/32K, 512 OTP, I2C, watchdog timer
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
BLOCK DIAGRAM
LOGIC SYMBOL
1999 Jul 23
80C51 8-bit microcontrollers
16K/32K, 512 OTP, I
INTERRUPTS
INT0 INT1
EXTERNAL
XTAL2 XTAL1
OSCILLATOR
FREQUENCY
REFERENCE
TIMING
INTERRUPTS
AND
CPU
INT0
INT1
RxD
TxD
INTERNAL
WR
RD
T0
T1
PSEN
RST
ALE
XTAL1
XTAL2
EA
64K-BYTE BUS
V
EXPANSION
DD
CONTROL
CONTROL
PROGRAM
MEMORY
EPROM)
(32K x 8
V
SS
2
C, watchdog timer
T2
T2EX
ADDRESS AND
MEMORY
(256 x 8)
SCL
SDA
ADDRESS BUS
DATA
DATA BUS
RAM
SU00165
PROGRAMMABLE I/O
ADDRESS/DATA BUS
PARALLEL PORTS,
AND I/O PINS
MEMORY
AUX–RAM
(256 x 8)
DATA
3
SERIAL IN
SYNCHRONOUS SHIFT
FULL DUPLEX UART
PROGRAMMABLE
SERIAL PORT
SHARED WITH
TIMER/EVENT
COUNTERS
TWO 16-BIT
COUNTERS
T0
PORT 3
SERIAL OUT
T1
EVENT COUNTER
16-BIT TIMER/
INTERFACE
SDA
T2
BIT-LEVEL
I
2
C
87C524/87C528
T2EX
SCL
Product specification
WATCHDOG
TIMER
RST
SU00166