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参数资料
| 型号： | 101-1293 |
| 厂商： | Rabbit Semiconductor |
| 文件页数： | 104/118页 |
| 文件大小： | 0K |
| 描述： | RCM4510W DEV KIT |
| 标准包装： | 1 |
| 类型： | 收发器，微处理器 |
| 频率： | 2.4GHz |
| 适用于相关产品： | RCM4510W |
| 已供物品： | 板，模块，天线，线缆，CD，文档，电源 |
| 其它名称： | 316-1189 |
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The drain on the battery by the RCM4510W is typically 7.5 μA when no other power is
supplied. If a 165 mA·h battery is used, the battery can last about 2.5 years:
165 mA·h
------------------------ = 2.5 years.
7.5 μA
The actual battery life in your application will depend on the current drawn by components
not on the RCM4510W and on the storage capacity of the battery. The RCM4510W 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 RCM4510W experience a loss
of main power.
NOTE: Remember to cycle the main power off/on any time the RCM4510W 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.
VRAM
VOSC
External Battery
VBAT-EXT
D4
R15
100 K W
R14
47 K W
C45
10 nF
Figure C-2. RCM4510W 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, VOSC, is supplied to U11, which keeps the 32.768 kHz oscillator working
when the voltage begins to drop.
C.1.3 Reset Generator
The RCM4510W uses a reset generator to reset the Rabbit 4000 microprocessor when the
voltage drops below the voltage necessary for reliable operation. The reset occurs between
98
RabbitCore RCM4500W
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相关代理商/技术参数 |
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| 101-1294 | 功能描述:处理器配件 12VDC POWER SUPPLY REPLACES 101-0686 RoHS:否 制造商:Olimex Ltd. 产品:Cable 用于: |
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| 10-112989-1 | 制造商: 功能描述: 制造商:undefined 功能描述: |
| 10112A WAF | 制造商:Intersil Corporation 功能描述: |
| 10112-A-0440-2 | 制造商:Amatom Electronic Hardware 功能描述: |
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