Overview
The VRS51L1050 is based on the standard 8051 microcontroller family architecture and is a pin compatible drop-in replacement for most 8051 MCUs.
   
Feature Set
• 8051/8052 pin compatible
• 64KB on-chip Flash memory
• In-System/In-Application Flash Programming (ISP/IAP)
• On-chip Charge Pump for Flash Programming
• 1024 Bytes on-chip Data SRAM
• Four 8-bit I/O Ports, one 4-bit I/O Port
• 2 PWM Outputs on P1.2 to P1.3 (8/5-bit resolution)
• 1 Full Duplex UART Serial Port
• I²C-compatible Interface
• Three 16-bit Timers/Counters
• Bit Operation Instruction
• 8-bit Unsigned Division and Multiply
• BCD Arithmetic
• Direct and Indirect Addressing
• 7 Interrupt Sources and 2 Levels of Interrupt Priority
• Power saving modes
• Wakeup from Power Down by Ext. Interrupt or Reset
• Code protection function
• Low EMI (inhibit ALE)
• Commercial Temperature Range (0°C to +70°C)
• 3.3V Operating Voltage