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參數(shù)資料
| 型號： | 20-101-1246 |
| 廠商： | Rabbit Semiconductor |
| 文件頁數(shù)： | 16/120頁 |
| 文件大?。?/td> | 0K |
| 描述： | CORE MODULE RCM5400W |
| 產品培訓模塊： | WiFi Authentication |
| 特色產品： | RCM5400 Family RabbitCore? |
| 標準包裝： | 50 |
| 系列： | RabbitCore® |
| 模塊/板類型： | MPU 核心模塊 |
| 適用于相關產品： | RCM5400W |
| 其它名稱： | 316-1148 |
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106
RabbitCore RCM4400W
The drain on the battery by the RCM5400W is typically 7.5 A when no other power is
supplied. If a 165 mAh battery is used, the battery can last about 2.5 years:
The actual battery life in your application will depend on the current drawn by components
not on the RCM5400W and on the storage capacity of the battery. The RCM5400W does not
drain the battery while it is powered up normally.
Cycle the main power off/on after you install a backup battery for the first time, and when-
ever you replace the battery. This step will minimize the current drawn by the real-time
clock oscillator circuit from the backup battery should the RCM5400W experience a loss
of main power.
NOTE: Remember to cycle the main power off/on any time the RCM5400W is removed
from the Prototyping Board or motherboard since that is where the backup battery
would be located.
Rabbit’s Technical Note TN235, External 32.768 kHz Oscillator Circuits, provides addi-
tional information about the current draw by the real-time clock oscillator circuit.
C.1.2 Battery-Backup Circuit
Figure C-2 shows the battery-backup circuit.
Figure C-2. RCM5400W Backup Battery Circuit
The battery-backup circuit serves three purposes:
It reduces the battery voltage to the SRAM and to the real-time clock, thereby limiting
the current consumed by the real-time clock and lengthening the battery life.
It ensures that current can flow only out of the battery to prevent charging the battery.
A voltage, VRAM, is supplied to Y3, the integrated 32.768 kHz oscillator, which keeps
working when the voltage begins to drop.
165 mAh
7.5 A
------------------------
2.5 years.
=
VRAM
100 kW
R14
VBAT-EXT
External Battery
D1
Y3
OSC
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參數(shù)描述 |
|---|---|
| 20-101-1247 | 功能描述:模塊化系統(tǒng) - SOM RCM5450W RABBITCORE MODULE RoHS:否 制造商:Digi International 外觀尺寸:ConnectCore 9P 處理器類型:ARM926EJ-S 頻率:150 MHz 存儲容量:8 MB, 16 MB 存儲類型:NOR Flash, SDRAM 接口類型:I2C, SPI, UART 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in |
| 20-101-1252 | 功能描述:開發(fā)板和工具包 - 其他處理器 RCM56/57 Prototyping Board RoHS:否 制造商:Freescale Semiconductor 產品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
| 20-101-1253 | 功能描述:開發(fā)板和工具包 - 其他處理器 RCM56/57XX Serial Comm Board RoHS:否 制造商:Freescale Semiconductor 產品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
| 20-101-1254 | 功能描述:子卡和OEM板 RCM56/57XX Digital I/O Board RoHS:否 制造商:BeagleBoard by CircuitCo 產品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| 20-101-1255 | 功能描述:單板計算機 BL4S100 512K w/ XBee RoHS:否 制造商:Ampro By ADLINK 外觀尺寸:EPIC 處理器類型:Intel Atom D510 頻率:1.66 GHz 存儲容量:2 GB (max) 存儲類型:DDR2, L2 Cache 接口類型:Ethernet, PS/2, SATA, Serial, USB 工作電源電壓:5 V, 12 V 功耗:13 W 最大工作溫度:+ 70 C 尺寸:165.1 mm x 114.3 mm |
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