83C749 Philips Semiconductors, 83C749 Datasheet - Page 3

• Manufacturer Part Number: 83C749
• Description: 80C51 8-bit microcontroller family 2K/64 OTP/ROM/ 5 channel 8-bit A/D/ PWM/ low pin count
• Manufacturer: Philips Semiconductors

Philips Semiconductors
BLOCK DIAGRAM
1998 Apr 23
80C51 8-bit microcontroller family
2K/64 OTP/ROM, 5 channel 8-bit A/D, PWM, low pin count
RST
V
V
CC
SS
X1
CONTROL
REGISTER
RAM ADDR
TIMING
REGISTER
OSCILLATOR
AND
B
PD
X2
AV
SS
RAM
ACC
ADC
AV
CC
TMP2
PSW
DRIVERS
P0.0–P0.4
PORT 0
PORT 0
LATCH
ALU
P1.0–P1.7
DRIVERS
PORT 1
PORT 1
LATCH
TMP1
PWM
3
PCON
INTERRUPT AND
TIMER BLOCKS
TH0
PORT 2
RTH
LATCH
RTL
TL0
IE
POINTER
DRIVERS
P3.0–P3.7
STACK
PORT 3
PORT 3
LATCH
TCON
EPROM
ROM/
PROGRAM
REGISTER
PROGRAM
ADDRESS
COUNTER
MENTER
INCRE-
BUFFER
83C749/87C749
DPTR
PC
Preliminary specification
SU00305