PRODUCT DESCRIPTION
SST89E564, SST89V564, SST89E554, and SST89V554 are members of the FlashFlex51 family of 8-bit microcontrollers. The FlashFlex51 is a family of microcontroller products designed and manufactured on the state-of-the-art SuperFlash CMOS semiconductor process technology. The device uses the same powerful instruction set and is pin-forpin compatible with standard 8xC5x microcontroller devices.

FEATURES:
• 8-bit 8051 Family Compatible Microcontroller (MCU) with Embedded SuperFlash Memory
• SST89E564/SST89E554 is 5V Operation
    – 0 to 40 MHz Operation at 5V
• SST89V564/SST89V554 is 3V Operation
    – 0 to 25 MHz Operation at 3V
• Fully Software and Development Toolset Compatible as well as Pin-For-Pin Package Compatible with Standard 8xC5x Microcontrollers
• 1 KByte Register/Data RAM
• Dual Block SuperFlash EEPROM
    – SST89E564/SST89V564: 64 KByte primary block + 8 KByte secondary block (128-Byte sector size)
    – SST89E554/SST89V554: 32 KByte primary block + 8 KByte secondary block (128-Byte sector size)
    – Individual Block Security Lock
    – Concurrent Operation during In-Application Programming (IAP)
    – Block Address Re-mapping
• Support External Address Range up to 64 KByte of Program and Data Memory
• Three High-Current Drive 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
• Watchdog Timer (WDT)
• Four 8-bit I/O Ports (32 I/O Pins)
• Second DPTR register
• Reduce EMI Mode (Inhibit ALE through AUXR SFR)
• SPI Serial Interface
• TTL- and CMOS-Compatible Logic Levels
• Brown-out Detection
• Extended Power-Saving Modes
    – Idle Mode
    – Power Down Mode with External Interrupt Wake-up
    – Standby (Stop Clock) Mode
• PDIP-40, PLCC-44 and TQFP-44 Packages
• Temperature Ranges:
    – Commercial (0°C to +70°C)
    – Industrial (-40°C to +85°C)