參數(shù)資料
型號： 20-101-0383
廠商： Rabbit Semiconductor
文件頁數(shù)： 66/80頁
文件大?。?/td> 0K
描述： MODULE RABBITCORE RCM2020
標(biāo)準(zhǔn)包裝： 1
系列： RabbitCore®
模塊/板類型： MPU 核心模塊
適用于相關(guān)產(chǎn)品： RCM2020
產(chǎn)品目錄頁面： 620 (CN2011-ZH PDF)
其它名稱： 316-1082
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
相關(guān)PDF資料
PDF描述
AT25128N-10SI-2.7 IC EEPROM 128KBIT 3MHZ 8SOIC
345-030-523-201 CARDEDGE 30POS DUAL .100 GREEN
345-030-521-802 CARDEDGE 30POS DUAL .100 GREEN
AT25128-10PI-2.7 IC EEPROM 128KBIT 3MHZ 8DIP
345-030-521-804 CARDEDGE 30POS DUAL .100 GREEN
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
20-101-0389 功能描述:子卡和OEM板 SR9200 16IN/8OUT RoHS:否 制造商:BeagleBoard by CircuitCo 產(chǎn)品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
20-101-0390 功能描述:子卡和OEM板 SR9210 8 in/ 16 out RoHS:否 制造商:BeagleBoard by CircuitCo 產(chǎn)品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
20-101-0391 功能描述:子卡和OEM板 SR9220 DIG I/O 8IN 8OUT RoHS:否 制造商:BeagleBoard by CircuitCo 產(chǎn)品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
20-101-0392 功能描述:子卡和OEM板 SR9300 A/D 0-10V RoHS:否 制造商:BeagleBoard by CircuitCo 產(chǎn)品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
20-101-0393 功能描述:子卡和OEM板 SR9400 D/A CARD RoHS:否 制造商:BeagleBoard by CircuitCo 產(chǎn)品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*