PRODUCT DESCRIPTION
The SST89E52RC / SST89E54RC are members of the FlashFlex family of 8-bit microcontroller products designed and manufactured with SST’s patented and proprietary SuperFlash CMOS semiconductor process technology. The split-gate cell design and thick-oxide tunneling injector offer significant cost and reliability benefits for our customers.The devices use the 8051 instruction set and are pinfor-pin compatible with standard 8051 microcontroller devices.

FEATURES:
• 8-bit 8051-Compatible Microcontroller (MCU) with Embedded SuperFlash Memory
    – Fully Software Compatible
    – Development Toolset Compatible
    – Pin-for-Pin Package Compatible
• SST89E5xRC Operation
    – 0 to 33MHz at 5V
• Total 512 Byte Internal RAM (256 Byte by default + 256 Byte enabled by software)
• Single Block SuperFlash EEPROM
    – SST89E54RC: 16 KByte primary partition + 1 KByte secondary partition
    – SST89E52RC: 8 KByte primary partition + 1 KByte secondary partition
    – Primary Partition is divided into Four Pages
    – Secondary Partition has One Page
    – Individual Page Security Lock
    – In-System Programming (ISP)
    – In-Application Programming (IAP)
    – Small-Sector Architecture: 128-Byte Sector Size
• Support External Address Range up to 64 KByte of Program and Data Memory
• Three High-Current Port 1 pins (16 mA each)
• Three 16-bit Timers/Counters
• Full-Duplex, Enhanced UART
    – Framing error detection
    – Automatic address recognition
• Eight Interrupt Sources at 4 Priority Levels
• Programmable Watchdog Timer (WDT)
• Four 8-bit I/O Ports (32 I/O Pins)
• Second DPTR register
• Low EMI Mode (Inhibit ALE)
• 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
• Low Power Modes
    – Power-down Mode with External Interrupt Wake-up
    – Idle Mode
• Selectable Operation Clock
    – Divide down to 1/4, 1/16, 1/256, or 1/1024th
• Temperature Ranges:
    – Commercial (0°C to +70°C)
• Packages Available
    – 40-pin PDIP
    – 44-lead PLCC
• All non-Pb (lead-free) devices are RoHS compliant