SN8P2604A
8-Bit Micro-Controller
3.1
3.2
3.3
3.4
OVERVIEW..................................................................................................................................... 38
POWER ON RESET......................................................................................................................... 39
WATCHDOG RESET...................................................................................................................... 39
BROWN OUT RESET ..................................................................................................................... 40
BROWN OUT DESCRIPTION............................................................................................... 40
THE SYSTEM OPERATING VOLTAGE DECSRIPTION................................................... 41
BROWN OUT RESET IMPROVEMENT .............................................................................. 41
EXTERNAL RESET........................................................................................................................ 44
EXTERNAL RESET CIRCUIT ....................................................................................................... 44
Simply RC Reset Circuit .......................................................................................................... 44
Diode & RC Reset Circuit........................................................................................................ 45
Zener Diode Reset Circuit........................................................................................................ 45
Voltage Bias Reset Circuit ....................................................................................................... 46
External Reset IC...................................................................................................................... 47
3.4.1
3.4.2
3.4.3
3.5
3.6
3.6.1
3.6.2
3.6.3
3.6.4
3.6.5
4
SYSTEM CLOCK.................................................................................................................................. 48
4.1
OVERVIEW..................................................................................................................................... 48
CLOCK BLOCK DIAGRAM .......................................................................................................... 48
OSCM REGISTER........................................................................................................................... 49
SYSTEM HIGH CLOCK ................................................................................................................. 50
EXTERNAL HIGH CLOCK.................................................................................................... 50
4.2
4.3
4.4
4.4.1
4.4.1.1 CRYSTAL/CERAMIC......................................................................................................... 51
4.4.1.2 RC......................................................................................................................................... 51
4.4.1.3 EXTERNAL CLOCK SIGNAL........................................................................................... 52
SYSTEM LOW CLOCK .................................................................................................................. 53
4.5
4.5.1
SYSTEM CLOCK MEASUREMENT .................................................................................... 54
5
SYSTEM OPERATION MODE........................................................................................................... 55
5.1
OVERVIEW..................................................................................................................................... 55
SYSTEM MODE SWITCHING....................................................................................................... 56
WAKEUP......................................................................................................................................... 58
OVERVIEW............................................................................................................................. 58
WAKEUP TIME ...................................................................................................................... 58
P1W WAKEUP CONTROL REGISTER................................................................................ 58
5.2
5.3
5.3.1
5.3.2
5.3.3
6
INTERRUPT........................................................................................................................................... 59
6.1
OVERVIEW..................................................................................................................................... 59
INTEN INTERRUPT ENABLE REGISTER................................................................................... 60
INTRQ INTERRUPT REQUEST REGISTER ................................................................................ 61
GIE GLOBAL INTERRUPT OPERATION .................................................................................... 61
PUSH, POP ROUTINE .................................................................................................................... 62
6.2
6.3
6.4
6.5
SONiX TECHNOLOGY CO., LTD
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Version 0.3
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