FlashFlex51 MCU
SST89C54 / SST89C58
Preliminary Specifications
SERIAL I/O (UART) .............................................................................................................................................. 31
1
WATCHDOG TIMER ............................................................................................................................................ 32
SECURITY LOCK ................................................................................................................................................ 32
2
Hard Lock ................................................................................................................................................. 32
SoftLock ................................................................................................................................................... 32
Status of the Security Lock ........................................................................................................................... 33
3
RESET ................................................................................................................................................................ 34
4
Power-On Reset ........................................................................................................................................... 34
POWER-SAVING MODES ................................................................................................................................... 35
5
CLOCK INPUT OPTIONS .................................................................................................................................... 37
ELECTRICAL SPECIFICATION ........................................................................................................................... 38
6
Absolute Maximum Ratings .......................................................................................................................... 38
Operation Range ........................................................................................................................................... 38
Reliability Characteristics .............................................................................................................................. 38
7
DC Electrical Characteristics ......................................................................................................................... 39
AC Electrical Characteristics ......................................................................................................................... 42
Explanation Of Symbols .......................................................................................................................... 43
8
External Clock Drive ................................................................................................................................ 44
Serial Port Timing - Shift Register Mode .................................................................................................. 45
9
PRODUCT ORDERING INFORMATION ............................................................................................................. 46
Part Number Valid Combinations .................................................................................................................. 46
10
PART NUMBER CROSS REFERENCE GUIDE .................................................................................................. 47
PACKAGING DIAGRAMS .................................................................................................................................... 48
11
12
13
14
15
16
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