參數(shù)資料
型號： 20-101-1246
廠商： Rabbit Semiconductor
文件頁數(shù)： 61/120頁
文件大小： 0K
描述： CORE MODULE RCM5400W
產(chǎn)品培訓(xùn)模塊： WiFi Authentication
特色產(chǎn)品： RCM5400 Family RabbitCore?
標(biāo)準(zhǔn)包裝： 50
系列： RabbitCore®
模塊/板類型： MPU 核心模塊
適用于相關(guān)產(chǎn)品： RCM5400W
其它名稱： 316-1148
OEM User’s Manual
39
4.3 Wi-Fi
Figure 9 shows a functional block diagram for the Wi-Fi circuits.
Figure 9. RCM5400W Wi-Fi Block Diagram
The Wi-Fi transmission is controlled by the Rabbit 5000 chip, which contains the Wi-Fi
Media Access Control (MAC). The Rabbit 5000 implements the 802.11b/g baseband
MAC functionality, and controls the 802.11b/g integrated Airoha AL2236 transceiver.
Program code is stored in parallel flash and is loaded into a fast SRAM for execution
when power is applied to the RCM5400W modules. Serial flash and low-power SRAM
memories are available for data storage. The data interface between the processor MAC
and the AL2236 transceiver consists of a D/A converter and an A/D converter. Both con-
verters convert “I” and “Q” data samples at a rate of 40 MHz.
The AL2236 is a single-chip transceiver with integrated power amplifier for the 2.4 GHz
Industrial, Scientific, and Medical (ISM) band. It is configured and controlled by the
Rabbit 5000 via a 3-wire serial data bus. The AL2236 contains the entire receiver, trans-
mitter, VCO, PLL, and power amplifier necessary to implement an 802.11b/g radio.
The AL2236 can transmit and receive data at up to 11Mbits/s in the 802.11b mode and at
up to 54 Mbits/s in the 802.11g mode. It supports 802.11b/g channels 1–13 (2.401 GHz to
2.472 GHz). Channel 14 is not used. The data modulate the channel carrier in such a way
so as to produce a spread spectrum signal within the 22 MHz channel bandwidth of the
selected channel. The channel numbers and associated frequencies are listed below in
The Wi-Fi channels have a certain amount of overlap with each other. The further apart
two channel numbers are, the less the likelihood of interference. If you encounter interfer-
ence with a neighboring WLAN, change to a different channel. For example, use channels
1, 6, and 11 to minimize any overlap.
U19
Antenna
Switch
P2
P1
XCVR
U18
AL2236
Rx Path
Tx Path
Rx
Baseband
Tx
Baseband
U17
Serial
Flash
3-wire serial bus
U4 or U12
Parallel
Flash
U2, U3, U11
SRAM
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