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AT76C505 Datasheet(PDF) 2 Page - ATMEL Corporation

Part No. AT76C505
Description  802.11b Media Access Controller (MAC) and Baseband with USB Interface
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT76C505 Datasheet(HTML) 2 Page - ATMEL Corporation

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AT76C505
2364DS–WLAN–07/03
Description
The AT76C505 is a single-chip baseband controller that can handle IEEE 802.11b stan-
dard compliant data rates of up to 11 Mbps and provides all processing and functionality
needed for the MAC protocol of IEEE 802.11b. The AT76C505 is a full-speed USB
device that can support up to four configurable Endpoints (EP) plus one Control EP. The
AT76C505 USB interface can support Suspend and Resume bus condition for saving
power during host idle periods.
Besides the USB interface unit, the AT76C505 chip contains a WEP engine block, a
MAC Support Unit (MSU), a 802.11b baseband controller, a memory controller and the
ARM
® subsystem consisting of an Interrupt Controller, two 32-bit timers and an address
decoder unit.
The ARM7TDMI core supports two alternative instruction sets. Powerful 32-bit code can
be executed by the processor in ARM operating mode. However, a 16-bit instruction
subset is also available in Thumb
® mode. Thumb mode can be selected to exploit full
processor power with limited external memory resources. Note that ARM7TDMI operat-
ing mode can be changed at run time with negligible overhead.


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