參數(shù)資料
型號(hào)： 101-0412
廠商： Rabbit Semiconductor
文件頁數(shù)： 71/90頁
文件大?。?/td> 0K
描述： INTERFACE PROG 12KEY DISP OP6700
標(biāo)準(zhǔn)包裝： 25
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： OP6700
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(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
101-0413 功能描述:開發(fā)軟件 DYNAMIC C SOFTWARE RoHS:否 制造商:Atollic Inc. 產(chǎn)品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors
101-0414 功能描述:界面開發(fā)工具 OP6700 RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
101-0415 功能描述:KIT TOOL FOR OP6700 INTL RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:Intellicom 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電源管理，電池充電器 嵌入式:否 已用 IC / 零件:MAX8903A 主要屬性:1 芯鋰離子電池 次要屬性:狀態(tài) LED 已供物品:板
101-0416-000 制造商:ITT Interconnect Solutions 功能描述:INSUL CA-KE18-1P FR / 101-0416-000 / Circular
101-0417 功能描述:開發(fā)板和工具包 - 其他處理器 USE 694-101-0580 RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評(píng)估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓:
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