參數(shù)資料
型號(hào)： 101-0654
廠商： Rabbit Semiconductor
文件頁(yè)數(shù)： 72/110頁(yè)
文件大?。?/td> 0K
描述： INTERFACE OP6800 W/ETHERNET 512K
標(biāo)準(zhǔn)包裝： 10
系列： SBC
模塊/板類型： 單板計(jì)算機(jī)模塊
適用于相關(guān)產(chǎn)品： OP6800
60
MiniCom (OP6800)
B.2 Batteries and External Battery Connections
The SRAM and the real-time clock have provision for battery backup. Power to the SRAM
and the real-time clock (VRAM) is provided by two different sources, depending on whether
the main part of the OP6800 is powered or not. When the OP6800 is powered normally, and
Vcc is within operating limits, the SRAM and the real-time clock are powered from Vcc. If
power to the board is lost or falls below 4.63 V, the VRAM and real-time clock power must
come from a backup battery in your system which you would connect to pin 40 of header J1
on the OP6800 via the ribbon cable. The backup battery should be able to supply 2.85 V–
3.15 V at 10
A.
The reset generator circuit controls the source of power by way of its /RESET output signal.
B.2.1 Battery-Backup Circuit
Figure B-1 shows the battery-backup circuit located on the OP6800 module.
Figure B-1. OP6800 Backup Battery 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 U6, 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 OP6800.
R38
10 kW
VRAM
External Battery
VBAT
R41
47 kW
2 kW
R39
RT1
22 kW
VBAT
Vcc
22 kW
R37
47 kW
VOSC
R36
D1
D3
D2
T
thermistor
J1:40
C17
10 nF
C27
10 nF
相關(guān)PDF資料
PDF描述
046232108015800 CONN FFC/FPC 8POS 1MM VERT SMD
395-030-520-201 CARD EDGE 30POS DL .100X.200 BLK
20-101-0463 COMPUTER SINGLE-BOARD BL2120
20-101-1220 COMPUTER SINGLE-BOARD BL4S200
006200512230000+ CONN FFC/FPC 12POS 1MM R/A SMD
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
101-0655 功能描述:開(kāi)發(fā)軟件 SNMP Module CD RoHS:否 制造商:Atollic Inc. 產(chǎn)品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors
10106551-JCB64LF 功能描述:板對(duì)板與夾層連接器 TRX EXT H-7ZCND0982 JRC RoHS:否 制造商:JAE Electronics 系列:WP3 產(chǎn)品類型:Receptacles 節(jié)距:0.4 mm 疊放高度:1 mm 安裝角: 位置/觸點(diǎn)數(shù)量:50 排數(shù):2 外殼材料:Plastic 觸點(diǎn)材料:Copper Alloy 觸點(diǎn)電鍍:Gold 電壓額定值:50 V 電流額定值:0.4 A
10106552-NFB71LF 功能描述:板對(duì)板與夾層連接器 NFB71LF10106552F.NEC RoHS:否 制造商:JAE Electronics 系列:WP3 產(chǎn)品類型:Receptacles 節(jié)距:0.4 mm 疊放高度:1 mm 安裝角: 位置/觸點(diǎn)數(shù)量:50 排數(shù):2 外殼材料:Plastic 觸點(diǎn)材料:Copper Alloy 觸點(diǎn)電鍍:Gold 電壓額定值:50 V 電流額定值:0.4 A
10106555-002LF 制造商:FCI 功能描述:511-526F-USB 制造商:FCI 功能描述:OEM ITEM 511-526F-USB
101-0656 功能描述:開(kāi)發(fā)軟件 PPP Module CD RoHS:否 制造商:Atollic Inc. 產(chǎn)品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors
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