Chapter 12
Real Time Clock (RTC)
RTC Operation
XII - 15
12.3 RTC Operation
When the RTCCTR.CLKEN is set to "1", RTC starts time counting by using the clock registers described in
[12.2.5 Clock Registers]. RTC has two types of interrupts, the periodic interrupt and the alarm interrupt.
The periodic interrupt occurs according to the condition set in the RTCCIRQ.
There are two alarm interrupts, Alarm-0 and Alarm-1.
<Alarm-0 interrupt>
Alarm-0 interrupt occurs when the condition which is defined with the AL0IRQMI, the AL0IRQH and the
AL0IRQW matches the calendar counter.
- When the RTCAL0IRQ.AL0IRQSET is "0", Alarm-0 interrupt does not occur.
- When the RTCAL0IRQ.AL0IRQWEN is "0", AL0IRQW is not compared with the calendar calculator.
- When the RTCAL0IRQ.AL0IRQHEN is "0", AL0IRQH is not compared with the calendar calculator.
- When the RTCAL0IRQ.AL0IRQMIEN is "0", AL0IRQMI is not compared with the calendar calculator.
<Alarm-1 interrupt>
Alarm-1 interrupt occurs when the condition which is defined with the AL1IRQMI, the AL1IRQH, the AL1IRQD
and the AL1IRQMO matches the calendar counter.
- When the RTCAL1IRQ.AL1IRQSET is "0", Alarm-1 interrupt does not occur.
- When the RTCAL1IRQ.AL1IRQMIEN is "0", AL1IRQMI is not compared with the calendar calculator.
- When the RTCAL1IRQ.AL1IRQHEN is "0", AL1IRQH is not compared with the calendar calculator.
- When the RTCAL1IRQ.AL1IRQDEN is "0", AL1IRQD is not compared with the calendar calculator.
- When the RTCAL1IRQ.AL1IRQMOEN is "0", AL1IRQMO is not compared with the calendar calculator.
Summary of Contents for MN101L Series
Page 1: ...Cover MICROCOMPUTER MN101L MN101LR05D 04D 03D 02D LSI User s Manual Pub No 21705 015E ...
Page 2: ......
Page 8: ......
Page 10: ......
Page 11: ...Contents Contents 0 ...
Page 22: ... Contents 11 ...
Page 23: ...I Chapter 1 Overview 1 ...
Page 62: ...Chapter 1 Overview I 40 Cautions for Circuit Setup ...
Page 63: ...II Chapter 2 CPU 2 ...
Page 94: ...Chapter 2 CPU II 32 Reset ...
Page 95: ...III Chapter 3 Interrupts 3 ...
Page 143: ...IV Chapter 4 Clock Mode Voltage Control 4 ...
Page 175: ...V Chapter 5 Watchdog Timer WDT 5 ...
Page 180: ...Chapter 5 Watchdog Timer WDT V 6 Operation ...
Page 181: ...VI Chapter 6 Power Supply Voltage Detection 6 ...
Page 189: ...VII Chapter 7 I O Port 7 ...
Page 248: ...Chapter 7 I O Port VII 60 Port 8 ...
Page 249: ...VIII Chapter 8 8 bit Timer 8 ...
Page 282: ...Chapter 8 8 bit Timer VIII 34 8 bit Timer Cascade Connection ...
Page 283: ...IX Chapter 9 16 bit Timer 9 ...
Page 346: ...Chapter 9 16 bit Timer IX 64 IGBT Output with Dead Time ...
Page 347: ...X Chapter 10 General Purpose Time Base Free Running Timer 10 ...
Page 361: ...XI Chapter 11 RTC Time Base Timer RTC TBT 11 ...
Page 371: ...XII Chapter 12 Real Time Clock RTC 12 ...
Page 389: ...XIII Chapter 13 Serial Interface 13 ...
Page 458: ...Chapter 13 Serial Interface XIII 70 IIC Communication ...
Page 459: ...XIV Chapter 14 DMA Controller 14 ...
Page 472: ...Chapter 14 DMA Controller XIV 14 DMA Data Transfer ...
Page 473: ...XV Chapter 15 Buzzer 15 ...
Page 479: ...XVI Chapter 16 A D Converter ADC 16 ...
Page 493: ...XVII Chapter 17 LCD 17 ...
Page 530: ...Chapter 17 LCD XVII 38 LCD Display Examples ...
Page 531: ...XVIII Chapter 18 ReRAM 18 ...
Page 538: ...Chapter 18 ReRAM XVIII 8 Command Library ...
Page 539: ...XIX Chapter 19 On Board Debugger 19 ...
Page 542: ...Chapter 19 On Board Debugger XIX 4 List of on board debugging functions ...
Page 543: ...XX Chapter 20 Appendix 20 ...