SONIX SN8P2624 - Page 4

SN8P2624
8-Bit Micro-Controller
SONiX TECHNOLOGY CO., LTD Page 4 Version 0.3
3
3
3
RESET..................................................................................................................................................... 37
3.1 OVERVIEW..................................................................................................................................... 37
3.2 POWER ON RESET......................................................................................................................... 38
3.3 WATCHDOG RESET...................................................................................................................... 38
3.4 BROWN OUT RESET ..................................................................................................................... 39
3.4.1 BROWN OUT DESCRIPTION................................................................................................. 39
3.4.2 THE SYSTEM OPERATING VOLTAGE DECSRIPTION........................................................ 40
3.4.3 BROWN OUT RESET IMPROVEMENT.................................................................................. 40
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
4
4
4
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 EXTERNAL HIGH CLOCK...................................................................................................... 48
4.4.1.1 CRYSTAL/CERAMIC......................................................................................................... 49
4.4.1.2 RC......................................................................................................................................... 49
4.4.1.3 EXTERNAL CLOCK SIGNAL........................................................................................... 50
4.5 SYSTEM
LOW CLOCK.................................................................................................................. 51
4.5.1 SYSTEM CLOCK MEASUREMENT ........................................................................................ 52
5
5
5
SYSTEM OPERATION MODE...........................................................................................................53
5.1 OVERVIEW..................................................................................................................................... 53
5.2 SYSTEM
MODE SWITCHING....................................................................................................... 54
5.3 WAKEUP......................................................................................................................................... 56
5.3.1 OVERVIEW .............................................................................................................................. 56
5.3.2 WAKEUP TIME........................................................................................................................ 56
5.3.3 P1W WAKEUP CONTROL REGISTER................................................................................... 57
6
6
6
INTERRUPT........................................................................................................................................... 58
6.1 OVERVIEW..................................................................................................................................... 58
6.2 INTEN INTERRUPT ENABLE REGISTER................................................................................... 59
6.3 INTRQ INTERRUPT REQUEST REGISTER ................................................................................ 60