Atmel

AT89C52J- 8 bit Microcontroller with 8k Bytes Flash

Photograph

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 128 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 40-pin DIP

Pin Description Pin Number Description 1 NC 2 - 9 P1.0 - P1.7 - Port 1 10 RST - Reset 11 P3.0 12 NC 13 - 19 P3.1 - P3.7 - Port 3 20 XTAL2 - Crystal 21 XTAL1 - Crystal 22 GND - Ground 23 NC 24 - 31 P2.0 - P2.7 - Port 2 32 PSEN - Program Store Enable 33 ALE/PROG 34 NC 35 EA/VPP 36 - 43 P0.7 - P0.0 - Port 0 44 Vcc - Positive Power Supply

Pin Layout Dimensional Drawing

Technical Data Data Sheet Atmel - Data Sheet for AT89C52 Application Notes Atmel - 80 Series Application Notes