Описание
The AT89LP2052 is a low-power, high-performance CMOS 8-bit microcontroller with 2/4K bytes of In-System Programmable Flash memory. The AT89LP2052 is built around an enhanced CPU core that can fetch a single byte from memory every clock cycle. In the classic 8051 architecture, each fetch required 6 clock cycles, forcing instructions to execute in 12, 24 or 48 clock cycles. In the AT89LP2052 CPU, instructions need only 1 to 4 clock cycles providing 6 to 12 times more throughput than the standard 8051. Seventy percent of instructions need only as many clock cycles as they have bytes to execute, and most of the remaining instructions require only one additional clock. The enhanced CPU core is capable of 20 MIPS throughput whereas the classic 8051 CPU can deliver only 4 MIPS at the same current consumption. Conversely, at the same throughput as the classic 8051, the new CPU core runs at a much lower speed and thereby greatly reduces power consumption. The two timer/counters in the AT89LP2052 is enhanced with two new modes. Mode 0 can be configured as a variable 9- to 16-bit timer/counter and Mode 1 can be configured as a 16-bit auto-reload timer/counter. In addition both timer/counters may be configured as 8-bit Pulse Width Modulators with 8-bit prescalers.
- Compatible with MCS®51 Products
- 20 MIPS Throughput at 20 MHz Clock Frequency and 2.7V, 85°C Operating Conditions
- Single Clock Cycle per Byte Fetch
- 2K Bytes of In-System Programmable (ISP) Flash Memory
- Serial Interface for Program Downloading
- 32-byte Fast Programming Mode
- 32-byte User Signature Array
- 2.4V to 5.5V VCC Operating Range
- Fully Static Operation: 0 Hz to 20 MHz
- 2-level Program Memory Lock
- 256 x 8 Internal RAM
- Hardware Multiplier
- 15 Programmable I/O Lines
- Configurable I/O with Quasi-bidirectional, Input, Push-pull Output, and Open-drain Modes
- Enhanced UART with Automatic Address Recognition and Framing Error Detection
- Enhanced SPI with Double-buffered Send/Receive
- Programmable Watchdog Timer with Software Reset
- 4-level Interrupt Priority
- Analog Comparator with Selectable Interrupt and Debouncing
- Two 16-bit Enhanced Timer/Counters with 8-bit PWM
- Brown-out Detector and Power-off Flag
- Internal Power-on Reset
- Low Power Idle and Power-down Modes
- Interrupt Recovery from Power-down Mode
