参数资料
型号: 20-101-0405
厂商: Rabbit Semiconductor
文件页数: 66/80页
文件大小: 0K
描述: MODULE RABBITCORE RCM2010
标准包装: 1
系列: RabbitCore®
模块/板类型: MPU 核心模块
适用于相关产品: RCM2010
产品目录页面: 620 (CN2011-ZH PDF)
其它名称: 316-1084
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
相关PDF资料
PDF描述
20-101-1093 RCM4110 RABBITCORE
20-101-0453 MODULE RABBITCORE RCM2300
20-101-1235 CORE MODULE RCM5700
11FMN-BMTTR-A-TB CONN FMN HSNG 11POS STAG REV SMD
046232103103800+ CONN FFC/FPC 3POS 1MM R/A SMD
相关代理商/技术参数
参数描述
20-101-0410 功能描述:单板计算机 OP6700/6600 battery RoHS:否 制造商:Ampro By ADLINK 外观尺寸:EPIC 处理器类型:Intel Atom D510 频率:1.66 GHz 存储容量:2 GB (max) 存储类型:DDR2, L2 Cache 接口类型:Ethernet, PS/2, SATA, Serial, USB 工作电源电压:5 V, 12 V 功耗:13 W 最大工作温度:+ 70 C 尺寸:165.1 mm x 114.3 mm
20-101-0411 功能描述:单板计算机 OP6700 RoHS:否 制造商:Ampro By ADLINK 外观尺寸:EPIC 处理器类型:Intel Atom D510 频率:1.66 GHz 存储容量:2 GB (max) 存储类型:DDR2, L2 Cache 接口类型:Ethernet, PS/2, SATA, Serial, USB 工作电源电压:5 V, 12 V 功耗:13 W 最大工作温度:+ 70 C 尺寸:165.1 mm x 114.3 mm
20-101-0412 功能描述:单板计算机 OP6600 RoHS:否 制造商:Ampro By ADLINK 外观尺寸:EPIC 处理器类型:Intel Atom D510 频率:1.66 GHz 存储容量:2 GB (max) 存储类型:DDR2, L2 Cache 接口类型:Ethernet, PS/2, SATA, Serial, USB 工作电源电压:5 V, 12 V 功耗:13 W 最大工作温度:+ 70 C 尺寸:165.1 mm x 114.3 mm
20-101-0420 功能描述:模块配件 FWT27/Pluggable RoHS:否 制造商:Lantronix 产品: 用于:
20-101-0421 功能描述:模块配件 FWT18/Pluggable RoHS:否 制造商:Lantronix 产品: 用于: