AT89S4051-24PU

ATMEL  AT89S4051-24PU  微控制器, 8位, 高性能 CMOS, AT89S4051, 24 MHz, 4 KB, 256 Byte, 20 引脚, DIP

The is a low-voltage, high-performance 8-bit CMOS Microcontroller with 4kB 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 AT89S4051 is a powerful microcontroller which provides a highly-flexible solution. 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.

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Compatible with MCS®51 products

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0 to 24MHz Fully static operation

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Two-level program memory lock

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256 x 8-bit Internal RAM

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15 Programmable I/O lines

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Two 16-bit timers/counters

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Six interrupt sources

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Programmable serial UART channel

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Direct LED drive outputs

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On-chip analog comparator with selectable interrupt

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8-bit PWM Pulse-width modulation

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Low power idle and power-down modes

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Brownout reset

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Enhanced UART serial port with framing error detection and automatic address recognition

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Internal power-on reset

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Interrupt recovery from power-down mode

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Programmable and fuseable x2 clock option

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Four-level enhanced interrupt controller

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Power-off flag

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Flexible programming byte and page modes