參數(shù)資料
型號(hào)： UPD78F9210GR-JJG-A
廠商： Renesas Electronics America
文件頁數(shù)： 18/175頁
文件大?。?/td> 0K
描述： MCU 8BIT 1KB FLASH MEM 16-SSOP
標(biāo)準(zhǔn)包裝： 1
系列： 78K0S/Kx1+
核心處理器： 78K0S
芯體尺寸： 8-位
速度： 10MHz
外圍設(shè)備： LVD，POR，PWM，WDT
輸入/輸出數(shù)： 13
程序存儲(chǔ)器容量： 1KB（1K x 8）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 128 x 8
電壓 - 電源 (Vcc/Vdd)： 2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 4x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 16-SSOP（0.173"，4.40mm 寬）
包裝： 托盤
其它名稱： 972-1045
UPD78F9210GR-JJG-A-ND
CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
User’s Manual U16994EJ6V0UD
112
Figure 6-25. Timing of Pulse Width Measurement Operation by Free-Running Counter
and Two Capture Registers (with Rising Edge Specified)
t
0000H
FFFFH
0001H
D0
D2
D1
D3
D2
D3
D1
D0 + 1
D2 + 1
D1 + 1
INTTM010
CR000 capture value
Count clock
TM00 count value
TI000 pin input
CR010 capture value
(D1
D0) × t
(D3
D2) × t
(D2
D1) × t
Note
Note The carry flag is set to 1. Ignore this setting.
(4) Pulse width measurement by means of restart
Specify both the rising and falling edges as the valid edges of the TI000 pin, by using bits 4 and 5 (ES000 and
ES010) of PRM00.
When input of a valid edge to the TI000 pin is detected, the count value of 16-bit timer/counter 00 (TM00) is
taken into 16-bit timer capture/compare register 010 (CR010), and then the pulse width of the signal input to
the TI000 pin is measured by clearing TM00 and restarting the count.
Sampling is performed at the interval selected by prescaler mode register 00 (PRM00) and a capture operation
is only performed when a valid level of the TI000 pin is detected twice, thus eliminating noise with a short
pulse width.
Caution
The measurable pulse width in this operation example is up to 1 cycle of the timer counter.
Figure 6-26. Control Register Settings for Pulse Width Measurement by Means of Restart
(with Rising Edge Specified) (1/2)
(a) Capture/compare control register 00 (CRC00)
7
0
6
0
5
0
4
0
3
0
CRC002
1
CRC001
1
CRC000
1
CRC00
CR000 used as capture register
Captures to CR000 at inverse edge to valid edge of TI000Note.
CR010 used as capture register
Note If the valid edge of TI000 is specified to be both the rising and falling edges, 16-bit timer capture/compare
register 000 (CR000) cannot perform the capture operation.
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