AT89C1051U Datasheet | Atmel

Features - patible with MCS-51™ Products - 1K Bytes of Reprogrammable Flash Memory - - - - - - - - - - - - Endurance: 1,000 Write/Erase Cycles 2.7V to 6V Operating Range Fully Static Operation: 0 Hz to 24 MHz Two-Level Program Memory Lock 64 x 8-Bit Internal RAM 15 Programmable I/O Lines Two 16-Bit Timer/Counters Six Interrupt Sources Programmable Serial UART Channel Direct LED Drive Outputs On-Chip Analog parator Low Power Idle and Power Down Modes Description The AT89C1051U is a low-voltage, high-performance CMOS 8-bit microputer with 1K bytes of Flash programmable and erasable read only memory. It has the same functionality and operation as the AT89C1051 with the addition of a UART programmable serial port. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is patible with the industry standard MCS-51™ instruction set. By bining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C1051U is a powerful microputer which provides a highly flexible and cost effective solution to many embedded control applications. The AT89C1051U provides the following standard features : 1K bytes of Flash, 64 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a five-vector, two-level interrupt architecture, a full duplex serial port, a precision analog parator, on-chip oscillator and clock circuitry. In addition, the AT89C1051U 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 hardware reset. 8-Bit Microcontroller with 1K Bytes Flash AT89C1051U Preliminary Pin Configuration PDIP/SOIC RST/VPP (RXD) P3.0 (TXD) P3.1 XTAL2 XTAL1 (INT0) P3.2 (INT1) P3.3 (T0) P3.4 (T1) P3.5 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15...