AT89S2051-24PU

The AT89S2051-24PU is a 8-bit low-voltage High-performance CMOS Microcontroller with 2kB of In-System Programmable (ISP) flash program memory. The AT89S2051/S4051 device is manufactured using high-density non-volatile 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 AT89S2051 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications. Moreover, the AT89S2051 is designed to be function compatible with the AT89C2051/C4051 devices, respectively. The AT89S2051 provides the following standard features 2K/4kB of flash, 256 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a six-vector, four level interrupt architecture, a full duplex enhanced serial port, a precision analogue comparator, on-chip and clock circuitry.

• Compatible with MCS®-51 products
• 2K/4kB In-System Programmable (ISP) flash program memory
• 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 analogue 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 fuse-able x2 clock option
• Four-level enhanced interrupt controller
• Power-off flag
• Flexible programming (byte and page modes)
• User serviceable signature page (32 bytes)