Chapter 9
16-bit Timer
IX
- 46
16-bit Timer Capture Function
9.8.2
Setup Example
Capture Function Setup Example
Here is an example that, using Timer 7, the value of the binary counter is loaded to the capture register at the
interrupt generation edge of IRQ0 signal to measure the pulse width. The rising edge is selected for the interrupt
generation edge and capture trigger generation edge.
The following is an example of setup procedures.
Figure:9.8.5 Pulse Width Measurement of External Interrupt 0 Input Signal
TM7BC counts up from "0x0000". Synchronizing with the External Interrupt 0 input signal, the value of TM7BC
is loaded to TM7IC.
At that time, the pulse width from a rising edge of the external interrupt input signal to the next rising edge can be
measured by reading the value of TM7IC through the interrupt process and calculating the difference between that
value and the last capture value (the last value of TM7IC).
Step
Setting
Register
Description
1
Disable the timer counter
TM7MD.TM7EN = 0
Disable the timer count operation.
2
Disable the interrupt
TM7ICR.TM7IE = 0
Disable the timer interrupt.
3
Set the timer mode register
TM7MD2.TM7BCR = 1
Select the TM7BC clear source.
4
TM7MD1.TM7CK1-0 = 00
TM7MD1.TM7PS1-0 = 00
Select HCLK as the count clock source.
5
Set the compare register
TM7PR1 = 0xFFFF
Setup data in TM7PR1 is loaded to TM7OC1.
6
Set the timer mode register
TM7MD2.T7ICT1-0 = 00
Select the capture trigger source.
7
TM7MD1.T7ICEDG1 = 1
TM7MD2.T7ICEDG0 = 1
Select the capture trigger edge.
8
Set the external interrupt
IRQISEL0.IRQ0SEL = 0
IRQIEN.IRQI0EN = 1
Enable the external interrupt pin.
9
Set the timer mode register
TM7MD3.TM7CKSMP = 0
Select the count clock for capture sampling.
10
Set the external interrupt
IRQ0ICR.REDG0 = 1
Set the external interrupt valid edge.
11
Set the interrupt level
IRQ0ICR.IRQ0LV1-0
Refer to [3.1.3 Maskable Interrupt Control Register Setup].
12
Enable the interrupt
IRQ0ICR.IRQ0IE = 1
13
Set the timer mode register
TM7MD2.T7ICEN = 1
Enable the capture trigger function
14
Enable the timer counter
TM7MD1.TM7EN = 1
Enable the timer count operation.
External Interrupt 0
IRQ0 input
Pulse width to be measured
interrupt
processing
interrupt
processing
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 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 ...