P87C660X2 PHILIPS [NXP Semiconductors], P87C660X2 Datasheet - Page 5

• Manufacturer Part Number: P87C660X2
• Description: 80C51 8-bit microcontroller family
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
BLOCK DIAGRAM (CPU-ORIENTED)
2003 Oct 02
80C51 8-bit microcontroller family
RAM, low voltage (2.7 to 5.5 V), low power, high speed (30/33
MHz), two 400KB I
EAV
PSEN
RST
ALE
PP
V
V
CC
SS
XTAL1
CONTROL
REGISTER
TIMING
RAM ADDR
REGISTER
OSCILLATOR
AND
B
PD
2
C interfaces
XTAL2
RAM
ACC
16 KB OTP/ROM, 512B
TMP2
DRIVERS
P1.0–P1.7
PORT 1
PORT 1
LATCH
PSW
DRIVERS
P0.0–P0.7
PORT 0
PORT 0
LATCH
ALU
I
2
SERIAL
C PORT
SDA
SCL
TMP1
5
I
2
SERIAL
C PORT
SDA1
SCL1
TIMERS
P.C.A.
SFRs
P2.0–P2.7
DRIVERS
PORT 2
PORT 2
LATCH
POINTER
DRIVERS
STACK
P3.0–P3.7
PORT 3
PORT 3
LATCH
MEMORY
OTP
TxD RxD
SERIAL
UART
PORT
P8xC660X2/661X2
8
PROGRAM
REGISTER
PROGRAM
MULTIPLE
ADDRESS
COUNTER
MENTER
DPTR’S
INCRE-
BUFFER
PC
8
SU01761
Product data
16