參數(shù)資料
型號： 101-0360
廠商： Rabbit Semiconductor
文件頁數(shù)： 66/80頁
文件大?。?/td> 0K
描述： KIT DEV RABBIT 2000 INT'L
標(biāo)準(zhǔn)包裝： 1
系列： RabbitCore 2000
類型： MPU 模塊
適用于相關(guān)產(chǎn)品： RCM2000，RCM2010，RCM2020
所含物品： RabbitCore 模塊、開發(fā)板、交流適配器、纜線和 Dynamic C? 光盤
其它名稱： 101-360
101-360-ND
User’s Manual
65
C.1.3 Power to VRAM Switch
The VRAM switch, shown in Figure C-3, allows a customer-supplied external battery 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
Transistor Q11 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 RCM2000 is not resetting (pin 2 on U10 is high), the /RES_OUT line will be
high. This turns on Q10, causing its collector to go low. This turns on Q11, allowing
VRAM to nearly equal Vcc.
When the RCM2000 is resetting, the /RES_OUT line will go low. This turns off Q10 and
Q11, providing an isolation between Vcc and VRAM.
The battery-backup circuit keeps VRAM from dropping below 2 V.
C.1.4 Reset Generator
The RCM2000 uses a reset generator, U10, 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. The RCM2000 has a reset output, pin 37 on
header J3, presented to the headers. The reset generator has a reset input, pin 38 on header
J3, that can be used to force the RCM2000 to reset.
FDV302P
Q11
R15
R16
VRAM
VCC
Q10
MMBT3904
22 kW
/RES_OUT
10 kW
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
101-0360-000 制造商:ITT Interconnect Solutions 功能描述:1010360000 / 101-0360-000 / Circular
10-103-6-05 制造商:Concord Electronics Inc 功能描述:
101-0361 功能描述:觸覺開關(guān) TACTILE SWITCH 6X6MM RoHS:否 制造商:C&K Components 工作力:2 N 執(zhí)行器:Round 電流額定值:50 mA 電壓額定值 DC:32 V 電壓額定值 AC: 功率額定值:1 VA 接地端子:Yes 觸點形式:SPST-NO 開關(guān)功能: 安裝風(fēng)格:SMD/SMT 安裝方向:Right 晶體管管座高度: 顏色: 照明:Not Illuminated 照明顏色: 封裝:
101-0361-EV 功能描述:觸覺開關(guān) TACTILE SWITCH 6X6MM RoHS:否 制造商:C&K Components 工作力:2 N 執(zhí)行器:Round 電流額定值:50 mA 電壓額定值 DC:32 V 電壓額定值 AC: 功率額定值:1 VA 接地端子:Yes 觸點形式:SPST-NO 開關(guān)功能: 安裝風(fēng)格:SMD/SMT 安裝方向:Right 晶體管管座高度: 顏色: 照明:Not Illuminated 照明顏色: 封裝:
101-0362 功能描述:觸覺開關(guān) TACTILE SWITCH 6X6MM RoHS:否 制造商:C&K Components 工作力:2 N 執(zhí)行器:Round 電流額定值:50 mA 電壓額定值 DC:32 V 電壓額定值 AC: 功率額定值:1 VA 接地端子:Yes 觸點形式:SPST-NO 開關(guān)功能: 安裝風(fēng)格:SMD/SMT 安裝方向:Right 晶體管管座高度: 顏色: 照明:Not Illuminated 照明顏色: 封裝:
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