參數(shù)資料
型號： 101-0412
廠商： Rabbit Semiconductor
文件頁數(shù)： 72/90頁
文件大小： 0K
描述： INTERFACE PROG 12KEY DISP OP6700
標(biāo)準(zhǔn)包裝： 25
系列： SBC
模塊/板類型： 單板計算機(jī)模塊
適用于相關(guān)產(chǎn)品： OP6700
70
Intellicom (OP6600/OP6700)
Figure C-4. VRAM Switch
Transistor Q3 is needed to provide a very small voltage drop between Vcc and VRAM
(<100 mV, typically 10 mV) so that the processor lines powered by Vcc will not have a
significantly different voltage than VRAM.
When the Intellicom is not resetting (pin 2 on U4 is high), the /RES line will be high. This
turns on Q4, causing its collector to go low. This turns on Q3, allowing VRAM to nearly
equal Vcc.
When the Intellicom is resetting, the /RES line will go low. This turns off Q3 and Q4, pro-
viding an isolation between Vcc and VRAM.
The battery-backup circuit keeps VRAM from dropping below 2 V.
C.2.3 Reset Generator
The Intellicom uses a reset generator, U2, to reset the Rabbit 2000 microprocessor when
the voltage drops below the voltage necessary for reliable operation. The reset occurs
between 4.50 V and 4.75 V, typically 4.63 V.
C.2.4 Replacing the Backup-Battery Board
The pluggable backup-battery board makes it easy to replace the backup battery with a
fresh backup battery on another backup battery board. Before replacing the backup-battery
board, make sure that the Intellicom is receiving power from the standard power supply.
This makes sure that data in RAM are not lost when the battery-backup board is removed
temporarily.
To replace the backup-battery board, remove the screw and unplug the old battery board as
shown in Figure C-5.
FDV302P
Q3
R23
R25
R24
VRAM
VCC
Q4
MMBT3904
22 kW
0 W
/RES
10 kW
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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 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓:
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