参数资料
| 型号： | 101-0525 |
| 厂商： | Rabbit Semiconductor |
| 文件页数： | 37/142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 |
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User’s Manual
125
Parallel Port PF7 on the Rabbit 3000 chip controls whether the linear regulator is on or off.
Parallel Port PB0 senses whether there is an output from the linear regulator, and shuts off
the RS-232 (except RxE, which is used to “listen”), RS-485, A/D converter, and relay sec-
tions via Parallel Ports PB6, PG0, PG1, PG4, and PG5 to conserve power.
E.2 Batteries and External Battery Connections
The SRAM and the real-time clock have battery backup. Power to the SRAM and the real-
time clock (VRAM) is provided by two different sources, depending on whether the main
part of the LP3500 is powered or not. When the LP3500 is powered normally, and Vcc is
within operating limits, the SRAM and the real-time clock are powered from Vcc. If power
to the board is lost or falls below 2.75 V, the VRAM and real-time clock power will come
from either the onboard or the external battery. The reset generator circuit controls the source
of power by way of its /RESET output signal.
A replaceable onboard 265 mAh lithium battery provides power to the real-time clock
and SRAM when all external power is removed from the circuit board and the LP3500
processor is off. The drain on the battery is typically 46 A under these worst-case condi-
tions, and so the expected life of the onboard battery is
The drain on the battery is typically less than 4 A when external power is applied, and so
the expected LP3500 battery in-service life is
The primary role of the onboard battery is to keep the SRAM and the real-time clock func-
tional when the LP3500 processor is off. Even though there is limited capacity in the
onboard battery, and its circuit is in parallel with that of the external battery, Rabbit
strongly recommends against relying on the onboard battery for any role besides that of
keeping the SRAM and the real-time clock functional when the LP3500 processor is off.
The short in-service life of the onboard battery highlights the importance of an external
battery, especially if the LP3500 is to operate in the power-save mode. A 2.8–3.3 V
external battery or equivalent “regulated” voltage is recommended.
There is provision for an external battery connection via pins 14 and 15 on header J2 on
the LP3500, and the LP3500 Prototyping Board has a plug-in header at J6 that can be used
to connect an external battery to the LP3500/Prototyping Board combination.
Cycle the main power off/on on the LP3500 after you install a backup battery for the first
time, and whenever you replace the battery. This step will minimize the current drawn by
the real-time clock oscillator circuit from the backup battery should the LP3500 experi-
ence a loss of main power.
265 mAh
46 A
------------------------
240 days.
=
265 mAh
4 A
------------------------
7.5 years.
=
相关PDF资料 |
PDF描述 |
|---|---|
| 101-0602 | COMPUTER SNGL BRD BL2500 44.2MHZ |
| 101-0673 | MODULE RABBITCORE RCM3610 |
| 101-0814 | COMPUTER SNG BD BL1810 512K SRAM |
| 101-1007 | MODULE POWERCORE FLEX 3810 |
| 101-1028 | MODULE RABBITCORE RCM3750 |
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 |
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