AT76C507

Features • USB Open Host Controller 1.1 Compliant • Integrates the IEEE 802.11 Physical Layer (Baseband) and the Medium Access Controller (MAC) for Supporting Standard Rates up to 11 Mbps • Supports Antenna Diversity Algorithm, Automatic Receive Gain Control, Transmit Gain • • • • • • • • • • • • • • • Control, Transmit Filter for Japanese Regulatory and Differential or Single-ended I- and Q-Baseband Signals Integrates 160 KBytes of SRAM Organized in Five Banks of 32 KBytes Each, Offering the Flexibility for Individually Configuring Each of Them as Program or Data Memory Zero Wait States for Program Execution Fast Data Transfers through DMA Channels Low-power ARM7TDMI® RISC Processor Integrates a Bootstrap ROM Supporting Firmware Uploading from a Serial DataFlash® Glueless Parallel Flash Memory Interface, Supporting up to 128 KBytes of Nonvolatile Memory Glueless External SRAM Interface for all MAC Operations, Supporting up to 128 KBytes of External Memory Wired Equivalency Privacy (WEP) in Hardware Supporting 64-bit and 128-bit Keys Hardware Implementation of TKIP Hardware Implementation of AES Encryption Supporting Various Modes (CCM/CTR/CBC) The WLAN Functions Can Be Easily Changed or Updated to New Requirements Since They are Implemented in Microcode Supports 11 Mbps Rates with Automatic Fallback to 5.5, 2, and 1 Mbps SPI Interface and 9 GPIO Pins 144-ball LFBGA Package Low-voltage 1.8V Operation 802.11b Media Access Controller (MAC) and Baseband with USB Master Capabilities AT76C507 Summary Block Diagram SPI Interface USB Master Interface Timers Boot ROM ARM7TDMI External Memory Interface Common Memory Interface Controller Decoder/ Arbiter/ Bridge MAC Support Unit (MSU) Interrupt Controller Internal Memory (SRAM) 802.11b Baseband Encryption/ Decryption Block 2384AS–WLAN–01/04 Note: This is a summary document. A complete document is available under NDA. For more information, please contact your local Atmel sales office. Description The AT76C507 is a single-chip baseband controller that can handle IEEE 802.11b standard compliant data rates of up to 11 Mbps and provides all processing and functionality needed for the MAC protocol of IEEE 802.11b. The AT76C507 incorporates a USB Open Host Controller (OHC), which is capable of processing all of the data type lists. The OHC has four states, which define its responsibilities relating to USB signaling and bus states. It is also responsible for managing all aspects of framing for the USB. These responsibilities include sending SOF Tokens on the bus and communicating with the Host Controller Driver on frame-specific information. Because the USB does not provide a mechanism for attached devices to arbitrate for granting the bus, arbitration is predictive with the Host Controller. USB by necessity supports a number of different communication models between software and endpoints (Bulk, Control, Interrupt and Isochronous). The usage of the bus varies by the type of service. The approach used by the Host Controller is to have two levels of arbitration to select among the endpoints. The first level of arbitration is at the list level. Each endpoint type needing service is in a list of a corresponding type and the Host Controller selects which list to service. Within a list, endpoints are given equal priority insuring that all endpoints of a certain type have more or less equal service opportunities. The AT76C507 provides two USB Full-Speed (12 Mbits) ports. Besides the USB interface, the AT76C507 contains a WEP/TKIP engine block, an AES engine block, a MAC Support Unit (MSU), a 802.11b Baseband controller, two memory controllers 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 operating mode can be changed at run time with negligible overhead. 2 AT76C507 2384AS–WLAN–01/04 Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel: (49) 71-31-67-0 Fax: (49) 71-31-67-2340 1150 East Cheyenne Mtn. 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Blvd. Colorado Springs, CO 80906, USA Tel: 1(719) 576-3300 Fax: 1(719) 540-1759 Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland Tel: (44) 1355-803-000 Fax: (44) 1355-242-743 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel: (81) 3-3523-3551 Fax: (81) 3-3523-7581 Literature Requests www.atmel.com/literature Disclaimer: A tmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. © Atmel Corporation 2003 . A ll rights reserved. A tmel ® a nd combinations thereof and DataFlash ® a re the registered trademarks of Atmel Corporation or its subsidiaries. ARM7TDMI ® a nd ARM ® a re the registered trademarks of ARM, Ltd. Other terms and product names may be the trademarks of others. Printed on recycled paper. 2384AS–WLAN–01/04