AT89S52 Datasheet

The AT89S52 is a low-power, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. The AT89S52 provides the following standard features: 8K bytes of Flash, 256 bytes of RAM, 32 I/O lines, Watchdog timer, two data pointers, three 16-bit timer/counters, a six-vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator, and clock circuitry.

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AT89S52 Features

• Compatible with MCS®-51 Products


• 8K Bytes of In-System Programmable (ISP) Flash Memory


• Endurance: 10,000 Write/Erase Cycles


• 4.0V to 5.5V Operating Range


• Fully Static Operation: 0 Hz to 33 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


• Full Duplex UART Serial Channel


• Low-power Idle and Power-down Modes


• Interrupt Recovery from Power-down Mode


• Watchdog Timer


• Dual Data Pointer


• Power-off Flag


• Fast Programming Time