AT89S4051

Features Compatible with MCS®51 Products 2K/4K Bytes of In-System Programmable (ISP) Flash Program Memory – Serial Interface for Program Downloading – Endurance: 10,000 Write/Erase Cycles 2.7V to 5.5V Operating Range Fully Static Operation: 0 Hz to 24 MHz (x1 and x2 Modes) Two-level Program Memory Lock 256 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 with Selectable Interrupt 8-bit PWM (Pulse-width Modulation) Low Power Idle and Power-down Modes Brownout Reset Enhanced UART Serial Port with Framing Error Detection and Automatic Address Recognition Internal Power-on Reset Interrupt Recovery from Power-down Mode Programmable and Fuseable x2 Clock Option Four-level Enhanced Interrupt Controller Power-off Flag Flexible Programming (Byte and Page Modes) – Page Mode: 32 Bytes/Page User Serviceable Signature Page (32 Bytes) 8-bit Microcontroller with 2K/4K Bytes Flash AT89S2051 AT89S4051 1. Description The AT89S2051/S4051 is a low-voltage, high-performance CMOS 8-bit microcontroller with 2K/4K bytes of In-System Programmable (ISP) Flash program memory. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89S2051/S4051 is a powe...