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參數(shù)資料
| 型號： | DRM045 |
| 英文描述： | Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board Designer Reference Manual |
| 中文描述： | 使用ASB520 MC68HC908QT2的紅外遙控器參考PC板設(shè)計參考手冊 |
| 文件頁數(shù)： | 23/80頁 |
| 文件大小： | 1025K |
| 代理商： | DRM045 |
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Hardware
SuperCap and Li-Ion Battery
DRM040 — Rev 0
Designer Reference Manual
MOTOROLA
Hardware
23
2.6 SuperCap and Li-Ion Battery
The SuperCap (0,47 farad) bridges short term power failures by
supplying the MCU in stop mode until it is discharged to a level where
the Li-Ion batteries will take over. Both the SuperCap and the Li-Ion
batteries feed the MCU via low forward voltage drop schottky barrier
diodes of type MBRM120E. The SuperCap is charged up by a current
limiting resistor of 470 ohms. The two Li-Ion batteries can be selectively
turned off by the MCU via the dual P-channel MOSFETs.
2.7 Trimmable 32768 Hertz crystal oscillator
The timebase of the MCU is a 32768 Hertz tuning fork type crystal. This
crystal as in the case of a watch has to be trimmed precisely to 32768
Hertz for low time drift RTC operation over extended periods of time.
Together with the trimmer capacitor C10 and the 100 kHz output
waveform at Timer1 output pin, the frequency of oscillation can be
trimmed. The 100 kHz signal is generated only in calibration mode.
2.8 LCD display
A 5 volt, four backplane LCD that provides the appropriate metering
symbols has been used.
2.9 Serial communication
Serial communication can be selected via jumpers J5 and J6 to route the
signals of the SCI either to the infrared LED & phototransistor to comply
with the IEC 61107 standard, or via the built in RS-232D level shifter to
the 9-pin D-Sub connector.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DRM10 | 功能描述:DIP 開關(guān)/ SIP 開關(guān) BCD 10 POS RoHS:否 制造商:Omron Electronics 位置數(shù)量:10 開關(guān)類型:DIP 執(zhí)行器:Rotary 端子節(jié)距:2.54 mm 觸點(diǎn)形式: 端接類型:Solder Pin 電流額定值:100 mA 電壓額定值 DC: 工作溫度范圍: 安裝:Through Hole |
| DRM1004 | 功能描述:DIP 開關(guān)/ SIP 開關(guān) ROTARY DIP SWITCH PLASTICSHAFT RoHS:否 制造商:Omron Electronics 位置數(shù)量:10 開關(guān)類型:DIP 執(zhí)行器:Rotary 端子節(jié)距:2.54 mm 觸點(diǎn)形式: 端接類型:Solder Pin 電流額定值:100 mA 電壓額定值 DC: 工作溫度范圍: 安裝:Through Hole |
| DRM101 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Blood Pressure Monitor Using the Flexis QE128 Family |
| DRM10C | 功能描述:SWITCH DIP MINI SHAFT 10POS T/H RoHS:否 類別:開關(guān) >> DIP 系列:DR 特色產(chǎn)品:RDM Series Rotary DIP Switch 標(biāo)準(zhǔn)包裝:70 系列:RDM 電路:十六進(jìn)制 位置數(shù):16 觸點(diǎn)額定電壓:0.1A @ 42VDC 觸動器類型:用于工具旋轉(zhuǎn) 觸動器電平:凹槽式 安裝類型:通孔 方向:頂部觸動 可清洗:是 其它名稱:EG4977-5RDMAR16PIT |
| DRM10C04 | 功能描述:編碼式波段開關(guān) SW DIP MINI SHAFT 10POS T/H RoHS:否 制造商:C&K Components 位置數(shù)量:10 輸出代碼:Binary Coded Decimal 執(zhí)行器:Screwdriver 觸點(diǎn)額定值: 端接類型:Solder Pin 封裝:Tube |
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