20-101-1202 Rabbit Semiconductor, 20-101-1202 Datasheet - Page 59
![RCM4400W (FCC CERTIFIED)](/photos/14/8/140870/20-101-1202_sml.jpg)
20-101-1202
Manufacturer Part Number
20-101-1202
Description
RCM4400W (FCC CERTIFIED)
Manufacturer
Rabbit Semiconductor
Type
Wi-Fi / 802.11.br
Datasheet
1.20-101-1202.pdf
(126 pages)
Specifications of 20-101-1202
Frequency
2.4GHz
Wireless Frequency
58.98 MHz
Supported Devices
RAM4400W
Tool / Board Applications
Wireless Connectivity-ZigBee, RF, Infrared, USB
Development Tool Type
Hardware / Software - Dev Kit (Dev Tool)
Rohs Compliant
Yes
For Use With/related Products
RCM4400W
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
316-1143
- Current page: 59 of 126
- Download datasheet (2Mb)
6. U
W
-F
F
SING THE
I
I
EATURES
6.1 Introduction to Wi-Fi
Wi-Fi, a popular name for 802.11b, refers to the underlying technology for wireless local
area networks (WLAN) based on the IEEE 802.11 suite of specifications conforming to
standards defined by IEEE. IEEE 802.11b describes the media access and link layer con-
trol for a 2.4 GHz implementation, which can communicate at a top bit-rate of 11 Mbits/s.
Other standards describe a faster implementation (54 Mbits/s) in the 2.4 GHz (802.11g)
and a 54 Mbits/s implementation in the 5.6 GHz band (802.11a). The adoption of 802.11
has been fast because it's easy to use and the performance is comparable to wire-based
LANs. Things look pretty much like a wireless LAN.
Wi-Fi (802.11b) is the most common and cost-effective implementation currently avail-
able. This is the implementation that is used with the RCM4400W RabbitCore module. A
variety of Wi-Fi hardware exists, from wireless access points (WAPs), various Wi-Fi
access devices with PCI, PCMCIA, CompactFlash, USB and SD/MMC interfaces, and
Wi-Fi devices such as Web-based cameras and print servers.
802.11b can operate in one of two modes—in a managed-access mode (BSS), called an
infrastructure mode, or an unmanaged mode (IBSS), called the ad-hoc mode. The 802.11
standard describes the details of how devices access each other in either of these modes.
6.1.1 Infrastructure Mode
The infrastructure mode requires an access point to manage devices that want to communi-
cate with each other. An access point is identified with a channel and service set identifier
(SSID) that it uses to communicate. Typically, an access point also acts as a gateway to a
wired network, either an Ethernet or WAN (DSL/cable modem). Most access points can
also act as a DHCP server, and provide IP, DNS, and gateway functions.
When a device wants to join an access point, it will typically scan each channel and look
for a desired SSID for the access point. An empty-string SSID (" ") will associate the
device with the first SSID that matches its capabilities.
Once the access point is discovered, the device will logically join the access point and
announce itself. Once joined, the device can transmit and receive data packets much like
an Ethernet-based MAC. Being in a joined state is akin to having link status in a
10/100Base-T network.
User’s Manual
53
Related parts for 20-101-1202
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![20-101-0575](/photos/6/75/67539/20-101-0575_tmb.jpg)
Part Number:
Description:
COMPUTER SGL-BRD BL2500 29.4MHZ
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0576](/photos/37/60/376010/bl2500_600_tmb.jpg)
Part Number:
Description:
COMPUTER SGL-BRD BL2500 29.4MHZ
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0412](/photos/37/60/376043/101-0412_tmb.jpg)
Part Number:
Description:
DISPLAY GRAPHIC 12KEY PROG OP670
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0411](/photos/37/60/376043/101-0412_tmb.jpg)
Part Number:
Description:
DISPLAY GRAPHIC 12KEY ETH OP6700
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0457](/photos/37/60/376012/bl20_600_tmb.jpg)
Part Number:
Description:
COMPUTER SINGLE-BOARD BL2030
Manufacturer:
Rabbit Semiconductor
![20-101-0455](/photos/37/60/376012/bl20_600_tmb.jpg)
Part Number:
Description:
COMPUTER SGL-BOARD ETH BL2010
Manufacturer:
Rabbit Semiconductor
![20-101-0497](/photos/37/60/376011/op6800_rgb_tmb.jpg)
Part Number:
Description:
MODULE OP6810 W/O ETH/MEM EXPANS
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0456](/photos/37/60/376012/bl20_600_tmb.jpg)
Part Number:
Description:
COMPUTER SINGLE-BOARD BL2020
Manufacturer:
Rabbit Semiconductor
![20-101-0591](/photos/37/60/376012/bl20_600_tmb.jpg)
Part Number:
Description:
COMPUTER BL2010 W/FRICTION LOCK
Manufacturer:
Rabbit Semiconductor
![20-101-0594](/photos/37/60/376012/bl20_600_tmb.jpg)
Part Number:
Description:
COMPUTER BL2020 W/FRICTION LOCK
Manufacturer:
Rabbit Semiconductor
![20-101-0602](/photos/37/60/376010/bl2500_600_tmb.jpg)
Part Number:
Description:
COMPUTER SGL-BRD BL2500 44.2MHZ
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0430](/photos/37/60/376012/bl20_600_tmb.jpg)
Part Number:
Description:
COMPUTER SGL-BOARD FULL BL2000
Manufacturer:
Rabbit Semiconductor
![20-101-0462](/photos/37/60/376013/bl2100_600_tmb.jpg)
Part Number:
Description:
COMPUTER SINGLE-BOARD BL2110
Manufacturer:
Rabbit Semiconductor
![20-101-0891](/photos/37/60/376014/bl2600_600_tmb.jpg)
Part Number:
Description:
COMPUTER SGL-BRD 29.4MHZ BL2610
Manufacturer:
Rabbit Semiconductor
Datasheet:
![20-101-0654](/photos/37/60/376011/op6800_rgb_tmb.jpg)
Part Number:
Description:
INTERFACE OP6800 512K FLASH&SRAM
Manufacturer:
Rabbit Semiconductor
Datasheet: