Chapter 3
Interrupts
External Interrupts
III - 47
3.3.4
Key Interrupt
Key interrupt (KEYIRQn) pin can be selected with the KEYIEN and KEYSEL. KEYIRQn is generated when one
of the KEYIRQ pins goes from "High" to "Low".
Setting example of KEYIRQ
The following example shows how to use P10, P11, P12 and P13 as KEYIRQ pins and generate IRQ7.
3.3.5
Noise Filter Function
Noise Filter (NF) controlled with NFCTR01, NFCTR23, NFCTR45 and NFCTR67 is available to eliminate input
noise at the external interrupt pins (IRQn). NF samples the input signal at IRQn, and when the input signal is sam-
pled three times and the level of it is not changed, the signal can pass through NF.
Figure:3.3.1 Eliminating input noise at IRQn with NF
..
NF cannot be used in STOP or HALT mode. When an IRQn is used as the trigger to return
from the STOP or HALT mode, NF of the IRQn must not be used.
..
Step
Settings
Register
Description
1
Set the input direction of
P10, P11, P12 and P13
P1DIR
Set P1DIR.P1DIR3-0 to "0000".
2
Add the pull-up resistors
P1PLUP
Set P1PLUP.P1PLU3-0 to "1111".
3
Set P10, P11, P12 and P13 as
KEYIRQ pins.
KEYSEL
KEYIEN
Set KEYSEL.KEYSEL3-0 to "0000".
Set KEYIEN.KEYEN3-0 to "1111".
4
Set the Interrupt level of IRQ7
IRQ7ICR
Set IRQ7ICR.LV1-0 as you like.
* IRQ7ICR.IR should be set to "0".
5
Enable IRQ7
IRQ7ICR
Set IRQ7ICR.IE to "1".
NF Sampling timing
Input signal at IRQn
Signal passed through NF
Содержание MN101L Series
Страница 1: ...Cover MICROCOMPUTER MN101L MN101LR05D 04D 03D 02D LSI User s Manual Pub No 21705 015E ...
Страница 2: ......
Страница 8: ......
Страница 10: ......
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 ...