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參數(shù)資料
| 型號(hào)： | M34509G4FP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO24 |
| 封裝： | 5.30 X 10.10 MM, 0.80 MM PITCH, PLASTIC, SSOP-24 |
| 文件頁(yè)數(shù)： | 109/143頁(yè) |
| 文件大?。?/td> | 1056K |
| 代理商： | M34509G4FP |
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Rev.1.03
2009.07.27
page 68 of 140
REJ03B0147-0103
4509 Group
Fig. 67 Bypass capacitor across the VSS line and the VDD line
2. Connection of bypass capacitor across VSS line and VDD line
Connect an approximately 0.1 F bypass capacitor across the VSS
line and the VDD line as follows:
Connect a bypass capacitor across the VSS pin and the VDD pin at
equal length.
Connect a bypass capacitor across the VSS pin and the VDD pin
with the shortest possible wiring.
Use lines with a larger diameter than other signal lines for VSS line
and VDD line.
Connect the power source wiring via a bypass capacitor to the VSS
pin and the VDD pin.
VSS
VDD
VSS
VDD
N.G.
O.K.
3. Wiring to analog input pins
Connect an approximately 100 to 1 k resistor to an analog sig-
nal line which is connected to an analog input pin in series.
Besides, connect the resistor to the microcomputer as close as
possible.
Connect an approximately 1000 pF capacitor across the Vss pin
and the analog input pin. Besides, connect the capacitor to the Vss
pin as close as possible. Also, connect the capacitor across the
analog input pin and the Vss pin at equal length.
<Reason>
Signals which is input in an analog input pin (such as an A/D con-
verter/comparator input pin) are usually output signals from sensor.
The sensor which detects a change of event is installed far from the
printed circuit board with a microcomputer, the wiring to an analog
input pin is longer necessarily. This long wiring functions as an an-
tenna which feeds noise into the microcomputer, which causes noise
to an analog input pin.
Fig. 68 Analog signal line and a resistor and a capacitor
Analog
input pin
VSS
Noise
Thermistor
Microcomputer
N.G.
O.K.
(Note)
Note : The resistor is used for dividing
resistance with a thermistor.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M34509G4HFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34509G4H-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34509G4-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34509T2-CPE | 功能描述:DEV TOOL COMPACT EMULATOR: 4508/ RoHS:否 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 內(nèi)電路編程器、仿真器以及調(diào)試器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 19/Jul/2010 標(biāo)準(zhǔn)包裝:1 系列:* 類型:* 適用于相關(guān)產(chǎn)品:* 所含物品:* |
| M34512M2 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
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