SN8P2610 Series
8-Bit Micro-Controller
3.1
3.2
3.3
3.4
OVERVIEW..................................................................................................................................... 37
POWER ON RESET......................................................................................................................... 38
WATCHDOG RESET...................................................................................................................... 38
BROWN OUT RESET ..................................................................................................................... 39
BROWN OUT DESCRIPTION ................................................................................................. 39
3.4.1
3.4.2
THE SYSTEM OPERATING VOLTAGE DECSRIPTION........................................................ 40
3.4.3
BROWN OUT RESET IMPROVEMENT.................................................................................. 40
3.5
EXTERNAL RESET ........................................................................................................................ 43
3.6
EXTERNAL RESET CIRCUIT ....................................................................................................... 43
3.6.1
3.6.2
3.6.3
3.6.4
3.6.5
4
4
Simply RC Reset Circuit ........................................................................................................... 43
Diode & RC Reset Circuit ........................................................................................................ 44
Zener Diode Reset Circuit ........................................................................................................ 44
Voltage Bias Reset Circuit........................................................................................................ 45
External Reset IC...................................................................................................................... 46
SYSTEM CLOCK .................................................................................................................................. 47
4.1
4.2
4.3
4.4
OVERVIEW..................................................................................................................................... 47
CLOCK BLOCK DIAGRAM .......................................................................................................... 47
OSCM REGISTER ........................................................................................................................... 48
SYSTEM HIGH CLOCK ................................................................................................................. 49
4.4.1
INTERNAL HIGH RC............................................................................................................... 49
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
5
5
SYSTEM CLOCK MEASUREMENT ........................................................................................ 53
SYSTEM OPERATION MODE ........................................................................................................... 54
5.1
5.2
5.3
OVERVIEW..................................................................................................................................... 54
SYSTEM MODE SWITCHING EXAMPLE ................................................................................... 55
WAKEUP ......................................................................................................................................... 57
OVERVIEW .............................................................................................................................. 57
WAKEUP TIME........................................................................................................................ 57
P1W WAKEUP CONTROL REGISTER ................................................................................... 57
5.3.1
5.3.2
5.3.3
6
6
INTERRUPT........................................................................................................................................... 58
6.1
6.2
6.3
6.4
OVERVIEW..................................................................................................................................... 58
INTEN INTERRUPT ENABLE REGISTER................................................................................... 58
INTRQ INTERRUPT REQUEST REGISTER ................................................................................ 59
GIE GLOBAL INTERRUPT OPERATION .................................................................................... 59
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