Cmsemicon SC8F577 Series - Page 2

V1.8
SC8F577x
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Manual
1. PRODUCT DESCRIPTION .................................................................................................. 8
1.1 FEATURES ..................................................................................................................................................................... 8
1.2 SYSTEM STRUCTURE DIAGRAM ....................................................................................................................................... 9
1.3 PIN ALLOCATION .......................................................................................................................................................... 10
1.3.1 SC8F5771 ............................................................................................................................................................. 10
1.3.2 SC8F5773 ............................................................................................................................................................. 10
1.3.3 SC8F5775 ............................................................................................................................................................. 11
1.3.4 SC8F5776 ............................................................................................................................................................. 12
1.4 SYSTEM CONFIGURATION REGISTER .............................................................................................................................. 14
1.5 ONLINE SERIAL PROGRAMMING ..................................................................................................................................... 16
2. CENTRAL PROCESSING UNIT (CPU) ............................................................................. 17
2.1 MEMORY ..................................................................................................................................................................... 17
2.1.1 Program Memory .................................................................................................................................................. 17
2.1.1.1 Reset Vector (0000H) ................................................................................................................................... 17
2.1.1.2 Interrupt Vector ............................................................................................................................................. 18
2.1.1.3 Jump Table ................................................................................................................................................... 19
2.1.2 Data Memory......................................................................................................................................................... 20
2.2 ADDRESSING MODE ..................................................................................................................................................... 25
2.2.1 Direct Addressing .................................................................................................................................................. 25
2.2.2 Immediate Addressing ........................................................................................................................................... 25
2.2.3 Indirect Addressing ................................................................................................................................................ 25
2.3 STACK ......................................................................................................................................................................... 26
2.4 ACCUMULATOR (ACC) .................................................................................................................................................. 27
2.4.1 General ................................................................................................................................................................. 27
2.4.2 ACC Applications .................................................................................................................................................. 27
2.5 PROGRAM STATUS REGISTER (STATUS) ....................................................................................................................... 28
2.6 PRE-SCALER (OPTION_REG) ..................................................................................................................................... 30
2.7 PROGRAM COUNTER (PC) ............................................................................................................................................ 32
2.8 WATCHDOG TIMER (WDT) ............................................................................................................................................ 33
2.8.1 WDT Period ........................................................................................................................................................... 33
2.8.2 Watchdog Timer Control ........................................................................................................................................ 33
3. SYSTEM CLOCK .............................................................................................................. 34
3.1 GENERAL .................................................................................................................................................................... 34
3.2 SYSTEM OSCILLATOR ................................................................................................................................................... 36
3.2.1 Internal RC Oscillation .......................................................................................................................................... 36
3.3 RESET TIME ................................................................................................................................................................ 36
3.4 OSCILLATOR CONTROL REGISTER .................................................................................................................................. 36
4. RESET ............................................................................................................................... 37
4.1 POWER ON RESET ........................................................................................................................................................ 37
4.2 EXTERNAL RESET ........................................................................................................................................................ 37
4.3 POWER OFF RESET ...................................................................................................................................................... 38
4.3.1 General ................................................................................................................................................................. 38
4.3.2 Improvements for Power off Reset ........................................................................................................................ 39
4.4 WATCHDOG RESET ...................................................................................................................................................... 39
5. SLEEP MODE ................................................................................................................... 40
5.1 ENTER SLEEP MODE .................................................................................................................................................... 40