The AT89S2051-24SU is a low-voltage, high-performance 8-bit CMOS Microcontroller with 2kB of In-system programmable (ISP) flash program memory. The device is manufactured using 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 AT89S2051 is a powerful microcontroller which provides a highly-flexible solution to many embedded control applications. It is designed with static logic for operation down to zero frequency and supports two software-selectable power saving modes. The idle mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt system to continue functioning. The power-down mode saves the RAM contents but freezes the disabling all other chip functions until the next external interrupt or hardware reset.
Compatible with MCS?51 products
0 to 24MHz Fully static operation
Two-level program memory lock
256 x 8-bit Internal RAM
15 Programmable I/O lines
Two 16-bit timers/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
(EN)
