參數(shù)資料
| 型號： | 20-101-1138 |
| 廠商： | Rabbit Semiconductor |
| 文件頁數(shù)： | 65/124頁 |
| 文件大?。?/td> | 0K |
| 描述： | RCM4300 RABBITCORE |
| 產品培訓模塊： | WiFi Authentication |
| 標準包裝： | 1 |
| 系列： | RabbitCore® |
| 模塊/板類型： | MPU 核心模塊 |
| 適用于相關產品： | RCM4300 |
| 其它名稱： | 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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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 20-101-1139 | 功能描述:模塊化系統(tǒng) - SOM RCM4310 RABBITCORE 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 |
| 20-101-1140 | 功能描述:WiFi/802.11模塊 RCM4400W CORE MODULE Wi-Fi/802.11 RoHS:否 制造商:Taiyo Yuden 支持協(xié)議:802.11 b/g/n 頻帶: 數(shù)據(jù)速率:150 Mbps 接口類型:SDIO 傳輸功率（最大）: 天線連接器類型: 工作電源電壓:3.4 V to 5.5 V 傳輸供電電流: 接收供電電流: 最大工作溫度:+ 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 產品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| 20-101-1154 | 功能描述:模塊化系統(tǒng) - SOM RCM4120 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 |
| 20-101-1170 | 功能描述:Zigbee/802.15.4模塊 RCM4510W CORE MODULE RoHS:否 制造商:Digi International 頻帶:902 MHz to 928 MHz 視線范圍: 數(shù)據(jù)速率: 靈敏度: 工作電源電壓:2.4 V to 3.6 V 傳輸供電電流:215 mA 接收供電電流:26 mA 輸出功率:250 mW 天線連接器類型:Wire 最大工作溫度:+ 85 C 尺寸:32.94 mm x 22 mm x 2.03 mm |
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