87C748 Philips Semiconductors, 87C748 Datasheet - Page 3

• Manufacturer Part Number: 87C748
• Description: 80C51 8-bit microcontroller family 2K/64 OTP/ROM/ low pin count
• Manufacturer: Philips Semiconductors

Philips Semiconductors
BLOCK DIAGRAM
1999 Apr 15
80C51 8-bit microcontroller family
2K/64 OTP/ROM, low pin count
RST
V
V
CC
SS
X1
CONTROL
TIMING
RAM ADDR
REGISTER
REGISTER
OSCILLATOR
AND
B
PD
X2
RAM
ACC
TMP2
PSW
ALU
P1.0–P1.7
DRIVERS
PORT 1
PORT 1
LATCH
DRIVERS
P0.0–P0.2
PORT 0
PORT 0
LATCH
TMP1
3
PCON
INTERRUPT AND
TIMER BLOCKS
TH0
RTH
TL0
RTL
IE
POINTER
STACK
DRIVERS
P3.0–P3.7
PORT 3
PORT 3
LATCH
TCON
EPROM
ROM/
PROGRAM
REGISTER
PROGRAM
COUNTER
ADDRESS
MENTER
INCRE-
BUFFER
83C748/87C748
DPTR
PC
Preliminary specification
SU00296