| Flash (Kbytes) | 4 |
| ISP | SPI |
| RAM (Bytes) | 128 |
| F.max (MHz) | 16 |
| Vcc (V) | 2.7-4.0 |
| I/O Pins | 32 |
| UART | 1 |
| 16-bit Timers | 2 |
| Watchdog | Yes |
| Pb-Free Packages | TQFP 44 PDIP 40 PLCC 44 |
Low-Voltage Microcontroller with 4K Bytes In-System Programmable Flash
The AT89LS51 is a low-voltage, high-performance CMOS 8-bit microcontroller with 4K bytes of in-system programmable Flash memory. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard 80C51 instruction set and pinout. The on-chip Flash allows the programmemory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with in-system programmable
Flash on a monolithic chip, the Atmel AT89LS51 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications.
The AT89LS51 provides the following standard features: 4K bytes of Flash, 128 bytes of RAM, 32 I/O lines, Watchdog timer, two data pointers, two 16-bit timer/counters, a five-vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator, and clock circuitry. In addition, the AT89LS51 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 oscillator, disabling all other chip functions until the next external interrupt or hardware reset.
| Speed (MHz)) | 电源供应 | 订购型号 | 封装 | 适用范围 |
| 16 | 2.7V to 4.0V | AT89LS51-16AU AT89LS51-16JU AT89LS51-16PU |
44A 44J 40P6 |
Industrial (-40°C to 85°C) |