参数资料
| 型号： | 20-101-1138 |
| 厂商： | Rabbit Semiconductor |
| 文件页数： | 65/124页 |
| 文件大小： | 0K |
| 描述： | RCM4300 RABBITCORE |
| 产品培训模块： | WiFi Authentication |
| 标准包装： | 1 |
| 系列： | RabbitCore® |
| 模块/板类型： | MPU 核心模块 |
| 适用于相关产品： | RCM4300 |
| 其它名称： | 316-1141 |
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RabbitCore RCM4300 User’s Manual
45
4.6 Memory
4.6.1 SRAM
All RCM4300 modules have 512K of battery-backed data SRAM installed at U10, and the
RCM4300 model has 512K of fast SRAM installed at U12.
4.6.2 Flash Memory
All RCM4300 modules also have up to 2MB of serial flash memory installed at U5.
A “user block” area is defined to store persistent data. The functions writeUserBlock
and readUserBlock are provided for this. Refer to the Rabbit 4000 Microprocessor
Designer’s Handbook
for additional information.
4.6.3 VBAT RAM Memory
The tamper detection feature of the Rabbit 4000 microprocessor can be used to detect any
attempt to enter the bootstrap mode. When such an attempt is detected, the VBAT RAM
memory in the Rabbit 4000 chip is erased. The serial bootloader on RCM4300 RabbitCore
modules uses the bootstrap mode to load the SRAM, which erases the VBAT RAM mem-
ory on any reset, and so it cannot be used for tamper detection.
4.6.4 microSD Cards
The RCM4300 supports a removable microSD Card up to a 1 GB to store data and Web
pages. The microSD Card is particularly suitable for mass-storage applications, but is
generally unsuitable for direct program execution.
Unlike other flash devices, the microSD Card has some intelligence, which facilitates
working with it. You do not have to worry about erased pages. All microSD Cards sup-
port 512-byte reads and writes, and handle any necessary pre-erasing internally.
Figure 14 shows how to insert or remove the microSD Card. The card is designed to fit
easily only one way — do not bend the card or force it into the slot. While you remove or
insert the card, take care to avoid touching the electrical contacts on the bottom of the card
to prevent electrostatic discharge damage to the card and to keep any moisture or other
contaminants off the contacts. You will sense a soft click once the card is completely
inserted. To remove it, gently press the card towards the middle of the RCM4300 — you
will sense a soft click and the card will be ready to be removed. Do not attempt to pull the
card from the socket before pressing it in — otherwise the ejection mechanism will get
damaged. The ejection mechanism is spring-loaded, and will partially eject the card when
used correctly.
NOTE: When using the optional Dynamic C FAT file system module, do not remove or
insert the microSD Card while LED DS4 above the
microSD Card is on to indi-
cate that the
microSD Card is mounted. The LED will go off when the microSD
Card is unmounted, indicating that it is safe to remove it.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 20-101-1139 | 功能描述:模块化系统 - SOM RCM4310 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 |
| 20-101-1140 | 功能描述:WiFi/802.11模块 RCM4400W CORE MODULE Wi-Fi/802.11 RoHS:否 制造商:Taiyo Yuden 支持协议:802.11 b/g/n 频带: 数据速率:150 Mbps 接口类型:SDIO 传输功率（最大）: 天线连接器类型: 工作电源电压:3.4 V to 5.5 V 传输供电电流: 接收供电电流: 最大工作温度:+ 80 C 尺寸:35 mm x 15 mm x 2.9 mm |
| 20-101-1153 | 功能描述:子卡和OEM板 RCM4300 Proto board RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| 20-101-1154 | 功能描述:模块化系统 - SOM RCM4120 RabbitCore- Module 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 |
| 20-101-1170 | 功能描述:Zigbee/802.15.4模块 RCM4510W CORE MODULE RoHS:否 制造商:Digi International 频带:902 MHz to 928 MHz 视线范围: 数据速率: 灵敏度: 工作电源电压:2.4 V to 3.6 V 传输供电电流:215 mA 接收供电电流:26 mA 输出功率:250 mW 天线连接器类型:Wire 最大工作温度:+ 85 C 尺寸:32.94 mm x 22 mm x 2.03 mm |
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