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參數(shù)資料
| 型號： | M66238FP |
| 元件分類： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | 50 MHz, OTHER CLOCK GENERATOR, PDSO32 |
| 封裝： | 0.450 INCH, PLASTIC, SOP-32 |
| 文件頁數(shù)： | 15/15頁 |
| 文件大?。?/td> | 152K |
| 代理商： | M66238FP |
M66238FP
REJ03F0268-0200 Rev.2.00 Mar 18, 2008
Page 9 of 14
3. Dummy trigger generating command
The internal status of sync clock generator becomes unstable and a stable sync clock output (CKO) is not obtained
after the power is turned on, after a reset is cleared or after an internal VCO oscillator frequency is set. To obtain a
stable sync clock output, enter a trigger signal from the TR input after VCO oscillator becomes stable, or enter a
dummy trigger generating command from the MCU. The PLL synthesizer oscillator frequency after the cancellation
of a reset depends on a default (See the register configuration).
Set the command for address (A1, A0) = (1, 1).
Data Bit
Description
Default
0
D0
1
The command must be stored two times continuously when a dummy trigger is
generated. For the first time, set the dummy trigger generating command with D0 = 1.
For the second time, set the dummy trigger generating command with D0 = 0.
The second setting becomes a sync edge and a clock begins to be output from CKO.
After the first setting, CKO is in the halt state.
0
D1
1
0
↓
0
D29
1
In normal use: "0"
0
Operating Timing
1. Sync Clock Spike Non-removal Mode upon Occurrence of Trigger
1.1 Setting of Trigger Edge when D1 = 0
One-shot pulse start timing:
1st leading edge of CKO after TR fall
One-shot pulse polarity:
Negative pulse
One-shot pulse width:
16 cycles of CKO
CKO output dividing ratio:
1/2 division
An example set for the condition of address (A1, A0) = (1, 0), data (D6, D5, D4, D3, D2, D1, D0) = (0, 1, 1, 0, 0, 0, 0)
is shown below. CKO is a clock output synchronized by TR and PULSE is a one-shot pulse synchronized with the rise
of CKO.
Internal VCO
oscillator clock
tp = 1 / fvco
tp = 1 / fout
tlp
tw (TR)
tsp (CKO)
tss (CKO)
tw (PULSE)
tss (PULSE)
SPIKE
t
TR
CKO
PULSE
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M66238FP(#TF0T) | 制造商:Renesas Electronics Corporation 功能描述: |
| M66239FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:High Speed Standard Clock Generator With Frequency Synthesizer |
| M66239FP(#RB0S) | 制造商:Renesas Electronics Corporation 功能描述: |
| M66240 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:4-CH 16-BIT PWM GENERATOR |
| M66240FP | 功能描述:IC REG CTRLR PWM 24SOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
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