Chapter 5
Watchdog Timer (WDT)
V
- 2
Overview
5.1
Overview
The watchdog timer (WDT) generates NMI (WDIRQ) when the dedicated counter (WDT-Counter) is not cleared
during the error detect period and overflows. When two consecutive WDIRQs occur without clearing WDT-
Counter, the LSI is reset by hardware. The clock source of WDT-Counter is selected from SOSCCLK or SRC-
CLK.
The following table shows the relationship between CPU mode and the WDT operation when WDT is active.
WDT-Counter is initialized when the LSI is reset or is in STOP mode.
Table:5.1.1 Relationship between CPU mode and WDT operation
..
When the WDIRQ is generated, the LSI can be in unexpected state. Therefore appropriate
measures to make the LSI operate normally should be taken.
..
CPU mode
WDT-Counter operation
NORMAL/IDLE/SLOW/HALT
Continue to count
* Count operation doesn’t stop even during the mode transition.
STOP
Stop counting (The value of WDT-Counter is cleared.)
* WDIRQ is not generated in STOP mode.
SOSCCLK
WDT-Counter
WDCTR
Reset/Interrupt
control
LSI reset
WDIRQ
Overflow
R
Write to WDCTR
Reset
SRCCLK
WDCTR.WDCKSEL
WDTCLK
Содержание MN101L Series
Страница 1: ...Cover MICROCOMPUTER MN101L MN101LR05D 04D 03D 02D LSI User s Manual Pub No 21705 015E ...
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Страница 11: ...Contents Contents 0 ...
Страница 22: ... Contents 11 ...
Страница 23: ...I Chapter 1 Overview 1 ...
Страница 62: ...Chapter 1 Overview I 40 Cautions for Circuit Setup ...
Страница 63: ...II Chapter 2 CPU 2 ...
Страница 94: ...Chapter 2 CPU II 32 Reset ...
Страница 95: ...III Chapter 3 Interrupts 3 ...
Страница 143: ...IV Chapter 4 Clock Mode Voltage Control 4 ...
Страница 175: ...V Chapter 5 Watchdog Timer WDT 5 ...
Страница 180: ...Chapter 5 Watchdog Timer WDT V 6 Operation ...
Страница 181: ...VI Chapter 6 Power Supply Voltage Detection 6 ...
Страница 189: ...VII Chapter 7 I O Port 7 ...
Страница 248: ...Chapter 7 I O Port VII 60 Port 8 ...
Страница 249: ...VIII Chapter 8 8 bit Timer 8 ...
Страница 282: ...Chapter 8 8 bit Timer VIII 34 8 bit Timer Cascade Connection ...
Страница 283: ...IX Chapter 9 16 bit Timer 9 ...
Страница 346: ...Chapter 9 16 bit Timer IX 64 IGBT Output with Dead Time ...
Страница 347: ...X Chapter 10 General Purpose Time Base Free Running Timer 10 ...
Страница 361: ...XI Chapter 11 RTC Time Base Timer RTC TBT 11 ...
Страница 371: ...XII Chapter 12 Real Time Clock RTC 12 ...
Страница 389: ...XIII Chapter 13 Serial Interface 13 ...
Страница 458: ...Chapter 13 Serial Interface XIII 70 IIC Communication ...
Страница 459: ...XIV Chapter 14 DMA Controller 14 ...
Страница 472: ...Chapter 14 DMA Controller XIV 14 DMA Data Transfer ...
Страница 473: ...XV Chapter 15 Buzzer 15 ...
Страница 479: ...XVI Chapter 16 A D Converter ADC 16 ...
Страница 493: ...XVII Chapter 17 LCD 17 ...
Страница 530: ...Chapter 17 LCD XVII 38 LCD Display Examples ...
Страница 531: ...XVIII Chapter 18 ReRAM 18 ...
Страница 538: ...Chapter 18 ReRAM XVIII 8 Command Library ...
Страница 539: ...XIX Chapter 19 On Board Debugger 19 ...
Страница 542: ...Chapter 19 On Board Debugger XIX 4 List of on board debugging functions ...
Страница 543: ...XX Chapter 20 Appendix 20 ...
Страница 555: ...Chapter 20 Appendix Instruction map XX 13 ...