FlashFlex51 MCU
SST89C54 / SST89C58
Preliminary Specifications
SERIAL I/O (UART) .............................................................................................................................................. 31
WATCHDOG TIMER ............................................................................................................................................ 32
SECURITY LOCK ................................................................................................................................................ 32
Hard Lock .................................................................................................................................................
32
SoftLock ...................................................................................................................................................
32
Status of the Security Lock ........................................................................................................................... 33
RESET ................................................................................................................................................................ 34
Power-On Reset ........................................................................................................................................... 34
POWER-SAVING MODES ................................................................................................................................... 35
CLOCK INPUT OPTIONS .................................................................................................................................... 37
ELECTRICAL SPECIFICATION ........................................................................................................................... 38
Absolute Maximum Ratings .......................................................................................................................... 38
Operation Range ........................................................................................................................................... 38
Reliability Characteristics .............................................................................................................................. 38
DC Electrical Characteristics ......................................................................................................................... 39
AC Electrical Characteristics ......................................................................................................................... 42
Explanation Of Symbols ..........................................................................................................................
43
External Clock Drive ................................................................................................................................
44
Serial Port Timing - Shift Register Mode ..................................................................................................
45
PRODUCT ORDERING INFORMATION ............................................................................................................. 46
Part Number Valid Combinations .................................................................................................................. 46
PART NUMBER CROSS REFERENCE GUIDE .................................................................................................. 47
PACKAGING DIAGRAMS .................................................................................................................................... 48
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漏 2000 Silicon Storage Technology, Inc.
3
344-2 8/00