Description
The AT89S2051/S4051 is a low-voltage, high-performance CMOS 8-bit microcontrol ler 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 powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications. Moreover, the AT89S2051/S4051 is designed to be function compatible with the AT89C2051/C4051 devices, respectively.
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
? 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)
