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AT89S52-24JI - AT89S52 40-Pin 24MHz 8kb 8-bit Microcontroller Technical Data

Photograph
AT89S52-24JI - AT89S52 40-Pin 24MHz 8kb 8-bit Microcontroller

Features
  • Compatible with MCS-51 Products
  • 8K Bytes of In-System Reprogrammable Flash Memory
  • Fully Static Operation: 0 Hz to 24 MHz
  • Three-level Program Memory Lock
  • 256 x 8-bit Internal RAM
  • 32 Programmable I/O Lines
  • Three 16-bit Timer/Counters
  • Eight Interrupt Sources
  • Programmable Serial Channel
  • Low-power Idle and Power-down Modes
  • 44-pin PLCC

Pin Layout
AT89S52-24JI Pin Layout

Pin Description
Pin Number Description
1 NC - Not Connected
2 - 9 P1.0 - P1.7 - Port 1
10 RST - Reset
11 P3.0 - Port 3
12 NC - Not Connected
13 - 19 P3.1 - P3.7 - Port 3
20 XTAL2 - Crystal
21 XTAL1 - Crystal
22 GND - Ground
23 NC - Not Connected
24 - 31 P2.0 - P2.7 - Port 2
32 PSEN - Program Store Enable
33 ALE/PROG - Program
34 NC - Not Connected
35 EA/VPP - Program Voltage
36 - 43 P0.7 - P0.1 - Port 0
44 Vcc - Positive Power Supply

Dimensional Drawing
PLCC44 Dimension Drawing