Atmel AT89C52

PORT 2 DRIVERS
PORT 2
LATCH
P2.0 - P2.7
FLASH
PORT 0
LATCH
RAM
PROGRAM
ADDRESS
REGISTER
BUFFER
PC
INCREMENTER
PROGRAM
COUNTER
DPTR
RAM ADDR.
REGISTER
INSTRUCTION
REGISTER
B
REGISTER
INTERRUPT, SERIAL PORT,
AND TIMER BLOCKS
STACK
POINTER
ACC
TMP2
TMP1
ALU
PSW
TIMING
AND
CONTROL
PORT 3
LATCH
PORT 3 DRIVERS
P3.0 - P3.7
PORT 1
LATCH
PORT 1 DRIVERS
P1.0 - P1.7
OSC
GND
V
CC
PSEN
ALE/PROG
EA / V
PP
RST
PORT 0 DRIVERS
P0.0 - P0.7
Block Diagram
2 AT89C52