The AT89S52 is a low-power, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. | Features Compatible with MCS-51 Products 8K Bytes of In-System Programmable ISP Flash Memory - Endurance 1000 Write Erase Cycles to 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 Flexible ISP Programming Byte and Page Mode Description The AT89S52 is a low-power high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. The device is manufactured using Atmel s high-density nonvolatile memory technology and is compatible with the industry-standard 80C51 instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with in-system programmable Flash on a monolithic chip the Atmel AT89S52 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications. 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. In addition the AT89S52 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM timer counters serial port and interrupt system to continue functioning. The Power-down mode saves the RAM contents but freezes the oscillator disabling all other chip functions until the next interrupt or hardware reset. imEL 8-bit Microcontroller with 8K Bytes In-System Programmable Flash AT89S52 .
