at89s53-33pc ATMEL Corporation, at89s53-33pc Datasheet - Page 3

• Manufacturer Part Number: at89s53-33pc
• Description: At89s53, In-system Programmable Microcontroller With 12k Bytes Flash. For New Designs Use At89s8253.
• Manufacturer: ATMEL Corporation

Block Diagram
0787E–MICRO–3/06
ALE/PROG
EA / V
PSEN
RST
V
GND
PP
CC
CONTROL
REGISTER
TIMING
OSC
AND
B
RAM ADDR.
REGISTER
INSTRUCTION
REGISTER
WATCH
DOG
ACC
TMP2
RAM
PORT 3 DRIVERS
PSW
P3.0 - P3.7
PORT 0 DRIVERS
PORT 3
LATCH
ALU
P0.0 - P0.7
PORT 0
LATCH
TMP1
INTERRUPT, SERIAL PORT,
AND TIMER BLOCKS
PORT 2
LATCH
PORT 1 DRIVERS
PORT 1
LATCH
PORT 2 DRIVERS
POINTER
P2.0 - P2.7
STACK
P1.0 - P1.7
FLASH
PORT
SPI
INCREMENTER
PROGRAM
PROGRAM
REGISTER
PROGRAM
ADDRESS
COUNTER
LOGIC
BUFFER
DPTR
PC
AT89S53
3