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參數(shù)資料
| 型號： | 101-0411 |
| 廠商： | Rabbit Semiconductor |
| 文件頁數(shù)： | 71/90頁 |
| 文件大小： | 0K |
| 描述： | INTERFACE 12KEYDISP ETHNT OP6700 |
| 標準包裝： | 25 |
| 系列： | SBC |
| 模塊/板類型： | 單板計算機模塊 |
| 適用于相關產品： | OP6700 |
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User’s Manual
69
Figure C-3 shows the battery-backup circuitry on the Intellicom board.
Figure C-3. Intellicom Battery-Backup Circuit
The battery-backup circuit serves three purposes:
It reduces the battery voltage to the SRAM and to the real-time clock, thereby limiting
the current consumed by the real-time clock and lengthening the battery life.
It ensures that current can flow only out of the battery to prevent charging the battery.
A voltage, VOSC, is supplied to U13, which keeps the 32.768 kHz oscillator working
when the voltage begins to drop.
VRAM and Vcc are nearly equal (<100 mV, typically 10 mV) when power is supplied to
the Intellicom. VRAM is also available on pin 34 of header J2 to facilitate battery backup
of the external circuit. Note that the recommended minimum resistive load at VRAM is
100 k
, and new battery life calculations should be done to take external loading into
account.
C.2.2 Power to VRAM Switch
The VRAM switch, shown in Figure C-4, allows the battery backup to provide power
when the external power goes off. The switch provides an isolation between Vcc and the
battery when Vcc goes low. This prevents the Vcc line from draining the battery.
R36
8.2 kW
VRAM
VBAT-EXT
External Battery
R37
47 kW
2 kW
R35
R39
22 kW
VBAT
Vcc
22 kW
R38
22 kW
U13
pin 5
R34
D4
D2
D3
T
thermistor
C16
1 nF
C15
1 nF
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相關代理商/技術參數(shù) |
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|---|---|
| 10104110 | 制造商:FCI-CONNECTOR 制造商全稱:FCI connector 功能描述:MICRO USB B TYPE RECEPTACLE |
| 10104110-0001LF | 功能描述:USB接頭 5P Quick Connect Micro USB TypeB Rcpt RoHS:否 制造商:FCI 產品:USB Type A Connectors 標準:USB 3.0 端口數(shù)量: 位置/觸點數(shù)量:9 型式:Female 電流額定值:1.8 A 安裝風格:Through Hole 端接類型:Solder Pin 連接器類型:USB 3.0 Receptacle |
| 10104110-0001LF | 制造商:FCI 功能描述:MICRO USB B, RECEPTACLE, 5POS, SMT RT AN |
| 10-104-11-01 | 制造商:Concord Electronics Inc 功能描述:Contact Solder ST Thru-Hole |
| 10-104-11-03 | 制造商:Concord Electronics Inc 功能描述: |
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