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| Features * ARM7TDMI(R) Core for Implementing Call Control Protocols (SIP, H.323, MGCP/MEGACO) TCP/IP and Controlling the Phone Functions * Internal 8-Kbyte Program and Data Cache Used for Fast Execution of the Communications Protocols and RTOS with Reduced Power Consumption * 16-bit DSP for Implementing the G.723.1, G.729ab, and G.711 Standards, in Addition to * * * * * * * * * * * * * * * * Acoustic Echo Cancellation Integrated Audio Codec with Both Main and Auxiliary Paths Wireless Interface Following the IEEE 802.11b Standard Wireless LAN MAC Unit with ARM7TDMI RISC Processor Glueless External Memory Interface Supporting Up to 16 Mbytes of External SRAM/Flash and 32 Mbytes of SDRAM Glueless Interface to 11 Mbps External 802.11-based Baseband Processor Enciphering/Deciphering of Wireless Data On-the-fly, by the Implementation of the RC4 Code Ensures Maximum Privacy of Data Supports 11 Mbps Rates with Automatic Fallback to 5.5, 2, and 1 Mbps USB Slave Interface (Control, Interrupt, Bulk-in, and Bulk-out Endpoints) Analog-to-Digital Converter with Up to 400K Samples/Sec on Two Input Channels One USART and One UART Serial Peripheral Interface (SPI) 64-key Keyboard Interface 4 x 4 LED Matrix Controller Minimum of 13 GPIO Pins (More are Available Based on Configuration) 217-pin PBGA Package Low-voltage 3.3 V Operation Wireless VoIP Phone-based on the 802.11 Standard Processor AT76C901 Summary Figure 1. Typical Application Using The AT76C901 Flash SRAM AT76C901 External Bus Interface ARM7TDMI 802.11 MAC 802.11 Interface DSP Subsystem Radio Circuitry ARM7TDMI Protocol Handing Control Keyboard Buzzer LED LCD Peripherals Audio Codec Speaker Microphone Audio to Headset Serial Port Accessory Controls Battery Charge Voltage TWI Bus - Battery Management - Voltage Regulation - LCD Bias - Other Phone ASICs 1652AS-VoIP-06/04 Note: This is a summary datasheet. A complete document is available under NDA. For more information, please contact your local Atmel Sales Office. Description The AT76C901 is highly integrated ASIC that can be used as a part of a wireless phone that utilizes an 802.11 LAN-based wireless medium and carries Voice over IP (VoIP) packets. Specified in this datasheet, an ARM(R) processor-based subsystem (Baseband Controller) performs most of the PLCP and low MAC functions defined in 802.11. A DSP, a Codec, and support circuitry perform the encoder function and interfacing to an external baseband processor for a DSSS system. An interrupt controller and multiple support peripherals are also included. The VoIP baseband device is intended to be used in a wireless phone which operates by encapsulating voice data within IP frames and transmitting the frames over a contention-based wireless medium. Specifically, the first application of the device is targeted at a wireless phone operating on an 802.11 wireless LAN at 2.4 GHz. Figure 1 shows an example of the device being utilized in a wireless phone. The AT76C901 device can be used in a wireless phone powered by battery cells. The device does not incorporate any access point type features, such as antenna diversity or Ethernet interfaces. Applications Assumptions 2 AT76C901 1652AS-VoIP-06/04 AT76C901 Pin Diagram 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 A MA B MA6 MA7 MA8 MA9 MA11 MA15_QL MA16_QU MA19_CKE MA20_C4C LD7 UD0 UD1 UD2 UD3 UD4 UD5 MA4 C GND15 MA0_NLB MA10 MA12 MA13 MA14 NCS0 MA18_RAS MA17_CAS NWR0_NWE LD6 LD5 LD4 LD3 GND14 UD6 VDDP8 D VCM MA2 GND13 MA1 NCS3 NCS2 NCS1 TDIA NRD_NOE NWR1_NUB CKE SDCLK SDCS LD2 GND12 LD1 LD0 MA3 RESET GND11 TMSA TDOA VDDP0 VDDC7 GND10 VDDC6 LFTA VDDP1 BBRnW_PLL GND9 UD7 CLKO BBRX_DAE E MIC_P IREF AVDD1 GP15 BBCS_CLK CLKI BBTX_DAE CALEN_PA F SPKR_P MIC_N AUX_IN AVDD2 BBRST_AD VDDP2 TCKA TRSTA G MICBIAS SPKR_N VBG AUX_OUT GP13 GP14 CCA_RSSI TCLK_RD0 H AGND2 AGND1 MICSET VDDC5 GND16 GND17 GND18 VDDC4 TXDATA TXPE TXRY_RD1 J AVDD3 AVDD4 ADC0 GND8 GND19 GND20 GND21 GND7 MRDY_RD2 RXDT_RD4 RXCL_RD3 K ADC1 AREFP AGND3 VDDC3 GND22 GND23 GND24 VDDC2 TR_SWITB RADIO_PE RXPE L AGND4 VDDP7 GP7 WKP SYNCLK SYNDAT SYNLE0 TR_SWIT M GP6 GP5 GP3 GP1_INT8 TDIA2 GP11 VDDP3 SYNLE1 N GP4 TEST GP0_INT7 VDDP6 SCL TDOA2 GP12 TRSTA2 P GP2_INT9 INT6 INT4 GND6 RW_GP3_0 RW_GP3_3 CL_GP4_3 VDDC1 GND5 VDDC0 LFTL C1_GP6_2 C3_GP6_4 GND4 MO_GP5_7 TCKA2 TMSA2 R INT5 INT3 GND3 RW_GP3_5 RW_GP3_1 CL_GP4_1 CL_GP4_0 CL_GP4_6 A2_GP2_6 DP VDDP4 TO1_GP5_3 C0_GP6_1 SC1_GP6_6 GND2 MI_GP5_6 SDA T INT2 GND1 RW_GP3_7 RW_GP3_6 VDDP5 CL_GP4_5 CL_GP4_2 C_GP2_2 C_GP2_0 A9_GP2_4 USBP TIN_GP5_1 TO2_GP5_4 SC_GP6_0 RXD0 GND0 TXD1 U INT1 INT0_OSC RW_GP3_2 RW_GP3_4 CL_GP4_4 CL_GP4_7 C_GP2_3 C_GP2_1 A3_GP2_7 A1_GP2_5 DM TIN_GP5_0 TO0_GP5_2 TO3_GP5_5 C2_GP6_3 TXD0 RXD1 3 1652AS-VoIP-06/04 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. Blvd. Colorado Springs, CO 80906, USA Tel: 1(719) 576-3300 Fax: 1(719) 540-1759 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel: (41) 26-426-5555 Fax: (41) 26-426-5500 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel: (33) 2-40-18-18-18 Fax: (33) 2-40-18-19-60 Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France Tel: (33) 4-76-58-30-00 Fax: (33) 4-76-58-34-80 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel: (852) 2721-9778 Fax: (852) 2722-1369 ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France Tel: (33) 4-42-53-60-00 Fax: (33) 4-42-53-60-01 1150 East Cheyenne Mtn. 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: Atmel 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. (c) Atmel Corporation 2004. All rights reserved. Atmel(R) and combinations thereof are the registered trademarks of Atmel Corporation or its subsidiaries. ARM (R) and ARM7TDMI (R) are the registered trademarks of ARM, Ltd. Other terms and product names may be the trademarks of others. Printed on recycled paper. 1652AS-VoIP-06/04 |
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