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
