參數(shù)資料
型號(hào): 20-101-0554
廠商: Rabbit Semiconductor
文件頁數(shù): 79/94頁
文件大?。?/td> 0K
描述: COMPUTER SNGL BD BL2000 BOTT MNT
標(biāo)準(zhǔn)包裝: 1
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: BL2000
76
Wildcat (BL2000)
C.2.3 Power to VRAM Switch
The VRAM switch, shown in Figure C-3, 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.
Figure C-3. VRAM Switch
Field-effect transistor Q9 is needed to provide a very small voltage drop between Vcc and
VRAM (<100 mV, typically 10 mV) so that the board components powered by Vcc will
not have a significantly different voltage than VRAM.
When the BL2000 is not in reset, the /RESET line will be high. This turns on Q8, causing
its collector to go low. This turns on Q9, allowing VRAM to nearly equal Vcc.
When the BL2000 is in reset, the /RESET line will go low. This turns off Q8 and Q9, pro-
viding an isolation between Vcc and VRAM.
FDV302P
Q9
R99
R104
R93
VRAM
VCC
Q8
MMBT3904
22 kW
0 W
/RESET
11 kW
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
20-101-0555 功能描述:單板計(jì)算機(jī) BL2000 Friction Lock RoHS:否 制造商:Ampro By ADLINK 外觀尺寸:EPIC 處理器類型:Intel Atom D510 頻率:1.66 GHz 存儲(chǔ)容量:2 GB (max) 存儲(chǔ)類型:DDR2, L2 Cache 接口類型:Ethernet, PS/2, SATA, Serial, USB 工作電源電壓:5 V, 12 V 功耗:13 W 最大工作溫度:+ 70 C 尺寸:165.1 mm x 114.3 mm
20-101-0556 功能描述:模塊化系統(tǒng) - SOM BL2000 W/IDCHEADERS RoHS:否 制造商:Digi International 外觀尺寸:ConnectCore 9P 處理器類型:ARM926EJ-S 頻率:150 MHz 存儲(chǔ)容量:8 MB, 16 MB 存儲(chǔ)類型:NOR Flash, SDRAM 接口類型:I2C, SPI, UART 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in
20-101-0561 功能描述:模塊化系統(tǒng) - SOM RCM3400 Rabbit Core RoHS:否 制造商:Digi International 外觀尺寸:ConnectCore 9P 處理器類型:ARM926EJ-S 頻率:150 MHz 存儲(chǔ)容量:8 MB, 16 MB 存儲(chǔ)類型:NOR Flash, SDRAM 接口類型:I2C, SPI, UART 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in
20-101-0562 功能描述:模塊化系統(tǒng) - SOM RCM3410 RABBITCORE RoHS:否 制造商:Digi International 外觀尺寸:ConnectCore 9P 處理器類型:ARM926EJ-S 頻率:150 MHz 存儲(chǔ)容量:8 MB, 16 MB 存儲(chǔ)類型:NOR Flash, SDRAM 接口類型:I2C, SPI, UART 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in
20-101-0563 功能描述:模塊配件 RCM3400 PROTOTYPING BOARD RoHS:否 制造商:Lantronix 產(chǎn)品: 用于: