P87C51RB2 PHILIPS [NXP Semiconductors], P87C51RB2 Datasheet - Page 5
P87C51RB2
Manufacturer Part Number
P87C51RB2
Description
80C51 8-bit microcontroller family
Manufacturer
PHILIPS [NXP Semiconductors]
Datasheet
1.P87C51RB2.pdf
(67 pages)
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Philips Semiconductors
BLOCK DIAGRAM (CPU-ORIENTED)
2003 Jan 24
80C51 8-bit microcontroller family
with 512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high
speed (30/33 MHz)
EAV
PSEN
RST
ALE
PP
V
V
CC
SS
XTAL1
CONTROL
REGISTER
TIMING
RAM ADDR
REGISTER
OSCILLATOR
AND
B
PD
XTAL2
RAM
ACC
8KB/16KB/32KB/64KB OTP
TMP2
DRIVERS
P1.0–P1.7
PORT 1
PORT 1
LATCH
PSW
DRIVERS
P0.0–P0.7
PORT 0
PORT 0
LATCH
ALU
TMP1
5
TIMERS
P.C.A.
SFRs
P2.0–P2.7
DRIVERS
PORT 2
PORT 2
LATCH
P87C51RA2/RB2/RC2/RD2
POINTER
DRIVERS
STACK
P3.0–P3.7
PORT 3
PORT 3
LATCH
MEMORY
OTP
8
PROGRAM
REGISTER
PROGRAM
MULTIPLE
ADDRESS
COUNTER
MENTER
DPTR’S
INCRE-
BUFFER
PC
8
SU01658
Product data
16
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