Atmel

AT89C2051 - 8 bit Microcontroller with 2k Byte Flash

Photograph - AT89C2051

Features - AT89C2051 Compatible with MCS-51 Products 2K Bytes of Reprogrammable Flash Memory 2.7 to 6V Operating Range Fully Static Operation: 0 Hz to 24 MHz Two-level Program Memory Lock 128 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 Comparator Low-power Idle and Power-down Modes 20-pin DIP

Pin Description - AT89C2051 Pin Number Description 1 RESET - Reset 2 P3.0 - Port 3 - RXD 3 P3.1 - Port 3 - TXD 4 XTAL2 - Crystal 5 XTAL1 - Crystal 6 P3.2 - Port 3 - INT0 7 P3.3 - Port 3 - INT1 8 P3.4 - Port 3 - TO 9 P3.5 - Port 3 - T1 10 GND - Ground 11 P3.7 - Port 3 12 P1.0 - Port 1 - AIN0 13 P1.1 - Port 1 - A1N1 14 P1.2 - Port 1 15 P1.3 - Port 1 16 P1.4 - Port 1 17 P1.5 - Port 1 18 P1.6 - Port 1 19 P1.7 - Port 1 20 Vcc - Positive Power Supply

Pin Layout - AT89C2051 Dimensional Drawing - AT89C2051

Technical Data - AT89C2051 Data Sheet Atmel - Data Sheet for AT89C2051 Application Notes Atmel - 80 Series Application Notes