●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)
