Features:

8-bit 8051-Compatible Microcontroller (MCU)with Embedded SuperFlash Memory? Fully Software-Compatible? Development Toolset Compatible? Pin-For-Pin Package Compatible
Dual Block SuperFlash EEPROM? 64 KByte primary block 8 KByte secondary block(128-Byte sector size for both blocks)? Individual Block Security Lock with SoftLock? Concurrent Operation duringIn-Application Programming (IAP)? Memory Overlay for Interrupt Support during IAP
Support External Address Range up to 64KByte of Program and Data Memory
Three High-Current Drive Ports (16 mA each)
Three 16-bit Timers/Counters
Full-Duplex, Enhanced UART? Framing Error Detection? Automatic Address Recognition
Ten Interrupt Sources at 4 Priority Levels? Four External Interrupt Inputs
Programmable Watchdog Timer (WDT)
Programmable Counter Array (PCA)
Second DPTR register
Low EMI Mode (Inhibit ALE)
SPI Serial Interface
Standard 12 Clocks per cycle, the device has an option to double the speed to 6 clocks per cycle.
TTL- and CMOS-Compatible Logic Levels
Brown-out Detection
Low Power Modes? Power-down Mode with External Interrupt Wake-up? Idle Mode
Packages Available? 40-contact WQFN (Port 4 feature not available)? 44-lead PLCC? 40-pin PDIP (Port 4 feature not available)? 44-lead TQFP
All non-Pb (lead-free) devices are RoHS compliant