SN8P2501BS Ver la hoja de datos (PDF) - Sonix Technology Co., Ltd
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SN8P2501BS Datasheet PDF : 101 Pages
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SN8P2501B
8-Bit Micro-Controller
3.1 OVERVIEW..................................................................................................................................... 36
3.2 POWER ON RESET......................................................................................................................... 37
3.3 WATCHDOG RESET...................................................................................................................... 37
3.4 BROWN OUT RESET ..................................................................................................................... 38
3.4.1 BROWN OUT DESCRIPTION ................................................................................................. 38
3.4.2 THE SYSTEM OPERATING VOLTAGE DECSRIPTION........................................................ 39
3.4.3 BROWN OUT RESET IMPROVEMENT.................................................................................. 39
3.5 EXTERNAL RESET ........................................................................................................................ 42
3.6 EXTERNAL RESET CIRCUIT ....................................................................................................... 42
3.6.1 Simply RC Reset Circuit ........................................................................................................... 42
3.6.2 Diode & RC Reset Circuit ........................................................................................................ 43
3.6.3 Zener Diode Reset Circuit ........................................................................................................ 43
3.6.4 Voltage Bias Reset Circuit........................................................................................................ 44
3.6.5 External Reset IC...................................................................................................................... 45
44 SYSTEM CLOCK .................................................................................................................................. 46
4.1 OVERVIEW..................................................................................................................................... 46
4.2 CLOCK BLOCK DIAGRAM .......................................................................................................... 46
4.3 OSCM REGISTER ........................................................................................................................... 47
4.4 SYSTEM HIGH CLOCK ................................................................................................................. 48
4.4.1 INTERNAL HIGH RC............................................................................................................... 48
4.4.2 EXTERNAL HIGH CLOCK...................................................................................................... 49
4.4.2.1 CRYSTAL/CERAMIC......................................................................................................... 50
4.4.2.2 RC......................................................................................................................................... 50
4.4.2.3 EXTERNAL CLOCK SIGNAL........................................................................................... 51
4.5 SYSTEM LOW CLOCK .................................................................................................................. 52
4.5.1 SYSTEM CLOCK MEASUREMENT ........................................................................................ 53
55 SYSTEM OPERATION MODE ........................................................................................................... 54
5.1 OVERVIEW..................................................................................................................................... 54
5.2 SYSTEM MODE SWITCHING EXAMPLE ................................................................................... 55
5.3 WAKEUP ......................................................................................................................................... 57
5.3.1 OVERVIEW .............................................................................................................................. 57
5.3.2 WAKEUP TIME........................................................................................................................ 57
5.3.3 P1W WAKEUP CONTROL REGISTER ................................................................................... 58
66 INTERRUPT........................................................................................................................................... 59
6.1 OVERVIEW..................................................................................................................................... 59
6.2 INTEN INTERRUPT ENABLE REGISTER................................................................................... 60
6.3 INTRQ INTERRUPT REQUEST REGISTER ................................................................................ 61
6.4 GIE GLOBAL INTERRUPT OPERATION .................................................................................... 61
SONiX TECHNOLOGY CO., LTD
Page 4
Preliminary Version 0.5
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