Description
The A/T89C51AC2 is a high performance Flash version of the 80C51 single chip 8-bit microcontrollers. It contains a 32 KB Flash memory block for program and data.

Features
• 80C51 Core Architecture
• 256 Bytes of On-chip RAM
• 1 KB of On-chip XRAM
• 32 KB of On-chip Flash Memory
    – Data Retention: 10 Years at 85°C Read/Write Cycle: 10K
• 2 KB of On-chip Flash for Bootloader
• 2 KB of On-chip EEPROM Read/Write Cycle: 100K
• 14-sources 4-level Interrupts
• Three 16-bit Timers/Counters
• Full Duplex UART Compatible 80C51
• Maximum Crystal Frequency 40 MHz, in X2 Mode, 20 MHz (CPU Core, 20 MHz)
• Five Ports: 32 + 2 Digital I/O Lines
• Five-channel 16-bit PCA with:
    – PWM (8-bit)
    – High-speed Output
    – Timer and Edge Capture
• Double Data Pointer
• 21-bit Watchdog Timer (7 Programmable Bits)
• 10-bit Resolution Analog to Digital Converter (ADC) with 8 Multiplexed Inputs
• On-chip Emulation Logic (Enhanced Hook System)
• Power Saving Modes:
    – Idle Mode
    – Power-down Mode
• Power Supply: 3V to 5.5V
• Temperature Range: Industrial (-40° to +85°C)
• Packages: VQFP44, PLCC44