Описание
The AT89S2051 is a low-voltage, high-performance CMOS 8-bit microcontroller with 2K bytes 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 and cost-effective solution to many embedded control applications. Moreover, the AT89S2051 is designed to be function compatible with the AT89S2051 devices, respectively. The AT89S2051 provides the following standard features: 2K bytes 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 analog comparator, on-chip and clock circuitry. Hardware support for PWM with 8-bit resolution and 8-bit prescaler is available by reconfiguring the two on-chip timer/counters. In addition, the AT89S2051 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
- 2K 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 (x1 and x2 Modes)
- 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
