参数资料
型号: 101-0525
厂商: Rabbit Semiconductor
文件页数: 39/142页
文件大小: 0K
描述: COMPUTER SINGLE-BOARD LP3500 FOX
标准包装: 50
系列: SBC
模块/板类型: 单板计算机模块
适用于相关产品: LP3500
其它名称: 316-1058
User’s Manual
127
E.2.3 Reset Generator
The LP3500 module uses a reset generator on the module, U11, to reset the Rabbit 3000
microprocessor when the voltage drops below the voltage necessary for reliable operation.
The reset occurs between 2.55 V and 2.75 V, typically 2.63 V.
E.3 Chip Select Circuit
The current drain on the battery in a battery-backed circuit must be kept at a minimum.
When the LP3500 is not powered, the battery keeps the SRAM memory contents and the
real-time clock (RTC) going. The SRAM has a powerdown mode that greatly reduces
power consumption. This powerdown mode is activated by raising the chip select (CS)
signal line. Normally the SRAM requires Vcc to operate. However, only 2 V is required
for data retention in powerdown mode. Thus, when power is removed from the circuit, the
battery voltage needs to be provided to both the SRAM power pin and to the CS signal
line. The CS control circuit accomplishes this task for the SRAM’s chip select signal line.
In a powered-up condition, the CS control circuit must allow the processor’s chip select
signal /CS1 to control the SRAM’s CS signal /CSRAM. So, with power applied, /CSRAM
must be the same signal as /CS1, and with power removed, /CSRAM must be held high
(but only needs to be battery voltage high).The isolated /CSRAM line has a 220 k
pullup
resistor to VRAM (R46). This pullup resistor keeps /CSRAM at the VRAM voltage level
(which under no power condition is the backup battery’s regulated voltage at a little more
than 2 V).
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相关代理商/技术参数
参数描述
101-0526 功能描述:开发板和工具包 - 其他处理器 LP3510 RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压:
101-0529 功能描述:开发板和工具包 - 其他处理器 LP3500 Tool Kit RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压:
101053 制造商:RUKO 功能描述:Bulk
101-0530 功能描述:开发板和工具包 - 其他处理器 LP3500 TOOLKIT Univr RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压:
101-0531 功能描述:单板计算机 BL2101 0-10V A/D 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