SN8P26L00 Series
8-Bit Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 4
Preliminary Version 0.2
3.1
OVERVIEW ........................................................................................................................................... 40
3.2
POWER
ON
RESET............................................................................................................................... 41
3.3
WATCHDOG
RESET ............................................................................................................................ 41
3.4
BROWN
OUT
RESET ........................................................................................................................... 42
3.4.1 BROWN OUT DESCRIPTION ........................................................................................................ 42
3.4.2 THE SYSTEM OPERATING VOLTAGE DECSRIPTION............................................................... 43
3.4.3 BROWN OUT RESET IMPROVEMENT ......................................................................................... 43
3.5
EXTERNAL
RESET .............................................................................................................................. 46
3.6
EXTERNAL
RESET
CIRCUIT ............................................................................................................. 46
3.6.1 Simply RC Reset Circuit .................................................................................................................. 46
3.6.2 Diode & RC Reset Circuit ............................................................................................................... 47
3.6.3 Zener Diode Reset Circuit ............................................................................................................... 47
3.6.4 Voltage Bias Reset Circuit............................................................................................................... 48
3.6.5 External Reset IC............................................................................................................................. 49
4 SYSTEM CLOCK ....................................................................................................................................... 50
4.1
OVERVIEW ........................................................................................................................................... 50
4.2
CLOCK
BLOCK
DIAGRAM................................................................................................................. 50
4.3
OSCM
REGISTER ................................................................................................................................. 51
4.4
SYSTEM
HIGH
CLOCK ....................................................................................................................... 52
4.4.1 INTERNAL HIGH RC...................................................................................................................... 52
4.4.2 EXTERNAL HIGH CLOCK............................................................................................................. 52
4.4.2.1 CRYSTAL/CERAMIC............................................................................................................. 53
4.4.2.2 RC............................................................................................................................................. 53
4.4.2.3 EXTERNAL CLOCK SIGNAL............................................................................................... 54
4.5
SYSTEM
LOW
CLOCK ........................................................................................................................ 55
4.5.1 SYSTEM CLOCK MEASUREMENT ............................................................................................... 56
5 SYSTEM OPERATION MODE ................................................................................................................ 57
5.1
OVERVIEW ........................................................................................................................................... 57
5.2
SYSTEM
MODE
SWITCHING
EXAMPLE ......................................................................................... 58
5.3
WAKEUP ............................................................................................................................................... 60
5.3.1 OVERVIEW ..................................................................................................................................... 60
5.3.2 WAKEUP TIME............................................................................................................................... 60
5.3.3 P1W WAKEUP CONTROL REGISTER .......................................................................................... 60
6 INTERRUPT................................................................................................................................................ 61
6.1
OVERVIEW ........................................................................................................................................... 61
6.2
INTEN
INTERRUPT
ENABLE
REGISTER ......................................................................................... 62
6.3
INTRQ
INTERRUPT
REQUEST
REGISTER....................................................................................... 63
6.4
GIE
GLOBAL
INTERRUPT
OPERATION .......................................................................................... 63
