参数资料
型号: 101-0492
厂商: Rabbit Semiconductor
文件页数: 73/110页
文件大小: 0K
描述: INTERFACE OP6800 W/ETHERNET PORT
标准包装: 25
系列: SBC
模块/板类型: 单板计算机模块
适用于相关产品: SR9160
产品目录页面: 618 (CN2011-ZH PDF)
其它名称: 316-1060
User’s Manual
61
B.2.2 Power to VRAM Switch
The VRAM switch on the OP6800 module, shown in Figure B-1, allows the battery
backup to provide power when the external power goes off. The switch provides an isola-
tion between Vcc and the battery when Vcc goes low. This prevents the Vcc line from
draining the battery.
Figure B-1. VRAM Switch
Field-effect transistor Q5 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 OP6800 is not in reset, the /RESET line will be high. This turns on Q2, causing
its collector to go low. This turns on Q5, allowing VRAM to nearly equal Vcc.
When the OP6800 is in reset, the /RESET line will go low. This turns off Q2 and Q5, pro-
viding an isolation between Vcc and VRAM.
B.2.3 Reset Generator
The OP6800 module uses a reset generator on the module, U1, 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.
FDV302P
Q5
R33
R17
R30
VRAM
VCC
Q2
MMBT3904
22 kW
0 W
/RESET
10 kW
相关PDF资料
PDF描述
11FMN-BMTR-A-TB CONN FMN HSNG 11POS SGL REV SMD
11FMN-BMT-A-TF CONN FMN HSNG 11POS SNGL NOR SMD
AT24C01-10SI-2.7 IC EEPROM 1KBIT 400KHZ 8SOIC
AT24C01-10PI-2.7 IC EEPROM 1KBIT 400KHZ 8DIP
20-101-1067 MODULE RABBITCORE RCM3305
相关代理商/技术参数
参数描述
101-0494 功能描述:模块化系统 - SOM RCM2250 RABBITCORE RoHS:否 制造商:Digi International 外观尺寸:ConnectCore 9P 处理器类型:ARM926EJ-S 频率:150 MHz 存储容量:8 MB, 16 MB 存储类型:NOR Flash, SDRAM 接口类型:I2C, SPI, UART 工作电源电压:3.3 V 最大工作温度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in
101-0495 功能描述:处理器配件 Baseplate RoHS:否 制造商:Olimex Ltd. 产品:Cable 用于:
101-0497 功能描述:单板计算机 OP6810 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
10104997-00C-10B 功能描述:高速/模块连接器 XCEDE 2W 6PVH 6COL RoHS:否 制造商:Molex 系列:iPass 产品类型: 排数: 列数: 位置/触点数量:38 安装角:Right 节距:0.8 mm 安装风格:Plug 端接类型:SMD/SMT 外壳材料:Thermoplastic 触点材料:High Performance Alloy (HPA) 触点电镀:Gold
10104997-00C-10DLF 功能描述:高速/模块连接器 XCEDE 2W 6PVH 6COL RoHS:否 制造商:Molex 系列:iPass 产品类型: 排数: 列数: 位置/触点数量:38 安装角:Right 节距:0.8 mm 安装风格:Plug 端接类型:SMD/SMT 外壳材料:Thermoplastic 触点材料:High Performance Alloy (HPA) 触点电镀:Gold