參數(shù)資料
型號: UPD78F9210CS-CAB-A
廠商: Renesas Electronics America
文件頁數(shù): 14/175頁
文件大?。?/td> 0K
描述: MCU 8BIT 1KB FLASH 16PIN
標(biāo)準(zhǔn)包裝: 400
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
程序存儲器容量: 1KB(1K x 8)
程序存儲器類型: 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-DIP(0.300",7.62mm)
包裝: 托盤
CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
User’s Manual U16994EJ6V0UD
108
Figure 6-21. Timing of Pulse Width Measurement Operation by Free-Running Counter
and One Capture Register (with Both Edges Specified)
t
0000H
FFFFH
0001H
D0
(D1
D0) × t
(D3
D2) × t
(D2
D1) × t
D1
D2
D3
D2
D3
D0 + 1
D1
D1 + 1
Count clock
TM00 count value
TI000 pin input
CR010 capture value
INTTM010
Note
Note The carry flag is set to 1. Ignore this setting.
(2) Measurement of two pulse widths with free-running counter
When 16-bit timer counter 00 (TM00) is operated in free-running mode, it is possible to simultaneously
measure the pulse widths of the two signals input to the TI000 pin and the TI010 pin.
Specify both the rising and falling edges as the valid edges of the TI000 and TI010 pins, by using bits 4 and 5
(ES000 and ES010) and bits 6 and 7 (ES100 and ES110) of PRM00.
When the valid edge specified by bits 4 and 5 (ES000 and ES010) of prescaler mode register 00 (PRM00) is
input to the TI000 pin, the value of TM00 is taken into 16-bit timer capture/compare register 010 (CR010) and
an interrupt request signal (INTTM010) is set.
Also, when the valid edge specified by bits 6 and 7 (ES100 and ES110) of PRM00 is input to the TI010 pin, the
value of TM00 is taken into 16-bit timer capture/compare register 000 (CR000) and an interrupt request signal
(INTTM000) is set.
Sampling is performed using the count clock cycle selected by prescaler mode register 00 (PRM00), and a
capture operation is only performed when a valid level of the TI000 or TI010 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.
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