这里我们对SST89E554单片机的基本性能特征介绍供客户及解密工程师参考借鉴，因为在IC解密、单片机解密及芯片解密过程中，对于解密工程师来说，只有在深入分析芯片本身的内部结构及加解密特征的基础上才能更好的把握解密的技术实现过程，选择最具可靠性和高效性的解密方案。
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SST89E554 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)
