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參數(shù)資料
| 型號： | M38007M1-XXXFP |
| 廠商： | Mitsubishi Electric Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 1 watt dc-dc converters |
| 中文描述： | 1瓦的DC - DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 128/173頁 |
| 文件大?。?/td> | 4203K |
| 代理商： | M38007M1-XXXFP |
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3800 GROUP USER’S MANUAL
3-26
APPENDIX
3.4 Countermeasures against noise
3.4.3. Consideration for oscillator
Take care to prevent an oscillator that generates
clocks for a microcomputer operation from being
affected by other signals.
(1) Keeping an oscillator away from large current
signal lines
Install a microcomputer (and especially an oscillator)
as far as possible from signal lines where a current
larger than the tolerance of current value flows.
Reason
In the system using a microcomputer, there are
signal lines for controlling motors, LEDs, and thermal
heads or others. When a large current flows through
those signal lines, strong noise occurs because of
mutual inductance.
(2) Keeping an oscillator away from signal lines
where potential levels change frequently
Install an oscillator and a connecting pattern of an
osillator away from signal lines where potential levels
change frequently. Also, do not cross such signal
lines over the clock lines or the signal lines which are
sensitive to noise.
Reason
Signal lines where potential levels change frequently
(such as the CNTR pin line) may affect other lines at
signal rising or falling edge. If such lines cross over
a clock line, clock waveforms may be deformed,
which causes a microcomputer failure or a program
runaway.
3.4.4 Setup for I/O ports
Setup I/O ports using hardware and software as follows:
<Hardware>
G
Connect a resistor of 100
or more to an I/O port
inseries.
<Software>
G
As for an input port, read data several times by a
program for checking whether input levels are
equal or not.
G
As for an output port, since the output data may
reverse because of noise, rewrite data to its port
latch at fixed periods.
G
Rewirte data to direction registers and pull-up
control registers (only the product having it) at fixed
periods.
When a direction register is set for input port again at fixed periods, a several-nanosecond short pulse may be
output from this port. If this is undesirable, connect a capacitor to this port to remove the noise pulse.
Fig.3.4.5 Wiring for a large current signal line
Fig.3.4.6 Wiring to a signal line where potential levels
change frequently
X
IN
X
OUT
V
SS
M
Microcomputer
Mutual inductance
Large
current
GND
X
IN
X
OUT
V
SS
CNTR
Do not cross
Fig. 3.4.7 Setup for I/O ports
Direction register
Port latch
Data bus
I/O port
pins
Noise
Noise
N.G.
O.K.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M38007M1-XXXFS | Single Output LDO, 800mA, Fixed and Adj., Internal Current limit, Thermal Overload Protection 3-DDPAK/TO-263 0 to 125 |
| M38007M1-XXXSP | Single Output LDO, 800mA, Fixed and Adj., Internal Current limit, Thermal Overload Protection 4-SOT-223 -40 to 125 |
| M38007M1-XXXSS | Single Output LDO, 800mA, Fixed and Adj., Internal Current limit, Thermal Overload Protection 4-SOT-223 -40 to 125 |
| M38007M2-XXXFP | 1 watt dc-dc converters |
| M38007M2-XXXFS | Single Output LDO, 800mA, Fixed and Adj., Internal Current limit, Thermal Overload Protection 8-SON -40 to 125 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38007RSS | 制造商:Renesas Electronics Corporation 功能描述:EMULATION MCU/8BIT CMOS EMULATION CHIP - Bulk |
| M38007T-ADS | 功能描述:DEV TEMPORARY TARGET BOARD FOR M RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 配件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:適配器板 適用于相關(guān)產(chǎn)品:RCB230，RCB231，RCB212 配用:26790D-ND - RCB BREAKOUT BOARD RS232 CABLE |
| M38007T-PRB | 功能描述:EV 64-PIN RSS/MCU TO .5, .65 & . RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 配件 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:USB 至 1-Wire? RJ11 適配器 適用于相關(guān)產(chǎn)品:1-Wire? 設(shè)備 產(chǎn)品目錄頁面:1429 (CN2011-ZH PDF) |
| M3801 BK001 | 制造商:Alpha Wire 功能描述:CBL 3COND 18AWG BLK 1000' |
| M3801 BK002 | 制造商:Alpha Wire 功能描述:CBL 3COND 18AWG BLK 500' |
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