AT89C55-24QI Atmel, AT89C55-24QI Datasheet - Page 2

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AT89C55-24QI

Manufacturer Part Number
AT89C55-24QI
Description
Microcontrollers (MCU) Microcontroller
Manufacturer
Atmel
Datasheet

Specifications of AT89C55-24QI

Data Bus Width
8 bit
Program Memory Type
Flash
Program Memory Size
20 KB
Data Ram Size
256 B
Interface Type
UART
Maximum Clock Frequency
24 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
PQFP-44
Minimum Operating Temperature
- 40 C
Lead Free Status / Rohs Status
No
Block Diagram
4-170
ALE/PROG
EA / V
PSEN
RST
GND
V
PP
CC
CONTROL
REGISTER
TIMING
AND
OSC
B
RAM ADDR.
REGISTER
AT89C55
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
FLASH
INCREMENTER
PROGRAM
REGISTER
PROGRAM
COUNTER
ADDRESS
BUFFER
DPTR
PC

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