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型號(hào)：	UPD780076
廠商：	NEC Corp.
元件分類：	8位微控制器
英文描述：	8-Bit Single-Chip Microcontrollers
中文描述：	8位單芯片微控制器
文件頁(yè)數(shù)：	168/592頁(yè)
文件大?。?/td>	3307K
代理商：	UPD780076

CHAPTER 8 16-BIT TIMER/EVENT COUNTERS 00, 01

s Manual U14260EJ3V1UD

(3) Pulse width measurement with free-running counter and two capture registers

When 16-bit timer counter 0n (TM0n) is operated in free-running mode, it is possible to measure the pulse width

of the signal input to the TI00n pin.

When the rising or falling edge specified by bits 4 and 5 (ES00n and ES01n) of prescaler mode register 0n

(PRM0n) is input to the TI00n pin, the value of TM0n is taken into 16-bit timer capture/compare register 01n

(CR01n) and an interrupt request signal (INTTM01n) is set.

Also, when the inverse edge to that of the capture operation to CR01n is input, the value of TM0n is taken into

16-bit timer capture/compare register 00n (CR00n).

Sampling is performed with the count clock cycle selected by prescaler mode register 0n (PRM0n), and a capture

operation is only performed when a valid level of the TI00n pin is detected twice, thus eliminating noise with a

short pulse width.

If the valid edge of the TI00n pin is specified to be both the rising and falling edges, 16-bit timer

capture/compare register 00n (CR00n) cannot perform the capture operation.

Figure 8-28. Control Register Settings for Pulse Width Measurement with Free-Running Counter and

Two Capture Registers (with Rising Edge Specified)

(a) 16-bit timer mode control register 0n (TMC0n)

(b) Capture/compare control register 0n (CRC0n)

0/1: Setting 0 or 1 allows another function to be used simultaneously with pulse width measurement.

See the description of the respective control registers for details.

Free-running mode

CR00n used as capture register

Captures to CR00n at edge reverse

to valid edge of TI00n pin.

CR01n used as capture register

Selects count clock (setting

is prohibited).

Specifies rising edge for pulse width detection.

Setting invalid (setting

is prohibited.)

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UPD780102MC-083-5A4-A	制造商:Renesas Electronics Corporation 功能描述:
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