AT 89C52 Microcontroller IC

4.0V to 5.5V Operating Range

Fully Static Operation: 0 Hz to 33 MHz

Three-level Program Memory Lock

128 x 8-bit Internal RAM

32 Programmable I/O Lines

Two 16-bit Timer/Counters

Six Interrupt Sources

Full Duplex UART Serial Channel

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The AT89C52 is a low power, high performance cmos 8 bit microcomputer with 4 kbytes of flash programmable and Erasable read only Memory .