AT89C52-20QC Atmel, AT89C52-20QC Datasheet - Page 2

• Manufacturer Part Number: AT89C52-20QC
• Description: Microcontrollers (MCU) Microcontroller
• Manufacturer: Atmel

Specifications of AT89C52-20QC

• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 8 KB
• Data Ram Size: 256 B
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: PQFP-44
• Minimum Operating Temperature: 0 C
• Lead Free Status / Rohs Status: No

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