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Features
• 8-bit Microcontroller Compatible with 8051 Products
• Enhanced 8051 Architecture
– Single Clock Cycle per Byte Fetch
– 12 Clock per Machine Cycle Compatibility Mode
– Up to 20 MIPS Throughput at 20 MHz Clock Frequency
– Fully Static Operation: 0 Hz to 20 MHz
– On-chip 2-cycle Hardware Multiplier
– 16x16 Multiply–Accumulate Unit
– 256 x 8 Internal RAM
– On-chip 1152 Bytes Expanded RAM (ERAM)
• Software Selectable Size (0, 256, 512, 768, 1024 or 1152 Bytes)
– Dual Data Pointers
– 4-level Interrupt Priority
• Nonvolatile Program and Data Memory
– 24KB/32KB of In-System Programmable (ISP) Flash Program Memory
– 512-byte User Signature Array
– Endurance: 10,000 Write/Erase Cycles
– Serial Interface for Program Downloading
– 2KB Boot ROM Contains Low Level Flash Programming Routines and a Default
Serial Bootloader
• Peripheral Features
– Three 16-bit Enhanced Timer/Counters
– Seven 8-bit PWM Outputs
– 16-bit Programmable Counter Array
• High Speed Output, Compare/Capture
• Pulse Width Modulation, Watchdog Timer Capabilities
– Enhanced UART with Automatic Address Recognition and Framing
Error Detection
– Enhanced Master/Slave SPI with Double-buffered Send/Receive
– Two Wire Interface 400K bit/s
– Programmable Watchdog Timer with Software Reset
– 8 General-purpose Interrupt and Keyboard Interface Pins
• Special Microcontroller Features
– Dual Oscillator Support: Crystal, 32 kHz Crystal, 8 MHz Internal (AT89LP51IC2)
– Two-wire On-Chip Debug Interface
– Brown-out Detection and Power-on Reset with Power-off Flag
– Selectable Polarity External Reset Pin
– Low Power Idle and Power-down Modes
– Interrupt Recovery from Power-down Mode
– 8-bit Clock Prescaler
• I/O and Packages
– Up to 40 Programmable I/O Lines
– Green (Pb/Halide-free) PLCC44, VQFP44, QFN44. PDIP40
– Configurable I/O Modes
• Quasi-bidirectional (80C51 Style), Input-only (Tristate)
• Push-pull CMOS Output, Open-drain
• Operating Conditions
– 2.4V to 5.5V V
CC
Voltage Range
–-40° C to 85°C Temperature Range
– 0 to 20 MHz @ 2.4V–5.5V (Single-cycle)
8-bit Flash
Microcontroller
with 24K/32K
bytes Program
Memory
AT89LP51RB2
AT89LP51RC2
AT89LP51IC2
Preliminary
3722A–MICRO–10/11
页面指南
