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Description as follow:

The AT89LS53-12JI is a low-power, wide-voltage range, high-performance CMOS 8-bit microcomputer with 12K bytes of downloadable Flash programmable and erasable read only memory. The device is manufactured using Atmels high density nonvolatile memory technology and is compatible with the industry standard 80C51 instruction set and pinout. The on-chip downloadable Flash allows the program memory to be reprogrammed in-system through an SPI serial interface or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with downloadable Flash on a monolithic chip, the Atmel AT89LS53-12JI is a powerful microcomputer which provides a highly flexible and cost effective solution to many embedded control applications. The AT89LS53-12JI provides the following standard features: 12K bytes of downloadable Flash, 256 bytes of RAM, 32 I/O lines, programmable 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 AT89LS53-12JI 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.

Parametrics

Absolute Maximum Ratings: (1)Operating Temperature: -55℃ to +125℃; (2)Storage Temperature: -65℃ to +150℃; (3)Voltage on Any Pin with Respect to Ground: -1.0V to +7.0V; (4)Maximum Operating Voltage: 6.6V; (5)DC Output Current: 15.0 mA.

Features

Features: (1)Compatible with MCS-51 Products; (2)12K Bytes of In-System Reprogrammable Downloadable Flash Memory; (3)2.7V to 6V Operating Range; (4)Fully Static Operation: 0 Hz to 12 MHz; (5)Three-Level Program Memory Lock; (6)256 x 8 bit Internal RAM; (7)32 Programmable I/O Lines; (8)Three 16-bit Timer/Counters; (9)Nine Interrupt Sources; (10)Programmable UART Serial Channel; (11)SPI Serial Interface; (12)Low Power Idle and Power Down Modes; (13)Interrupt Recovery From Power Down; (14)Programmable Watchdog Timer; (15)Dual Data Pointer; (16)Power Off Flag.

Diagrams