AT76C902 Datasheet, PDF (1/3 Pages) ATMEL Corporation – Wireless VoIP Processor Implementing the 802.11 Standard

Features
• ARM946E-S^TM Core (ARM9) for implementing the VoIP Protocol, TCP/IP, VPN and
Controlling the Phone Functions with Internal 8K Instruction Cache and 8K Data Cache
Used for Fast Execution of the Communications Protocols and RTOS with Reduced
Power Consumption
• ARM7TDMI^TM Core (ARM7) for Implementing the 802.11 MAC Layer
• Configurable Memory Banks to Assign Memory where Best Needed in Chip
• 16-bit Dual-MAC DSP for Implementing the G.723.1, G.729 and G.711.1 Standards, in
Addition to Acoustic Echo Cancellation
• Integrated Audio Codec with Two Differential Multiplexed Microphone Inputs, One
Differential Speaker Output and One Differential Auxiliary Output Path
• Glueless External Memory Interface Supporting up to 16 MB of External SRAM, 16 MB
of Flash and 512 MB of SDRAM
• Hardware Security Accelerators Attached to the Common Bus Offer Instantaneous
Encryption/Decryption and Authentication Support for the Following Algorithms:
CCM/CTR/CBC Modes of Advanced Encryption Standard (AES) DES/3DES,WEP64/128,
Temporal Key Integrity Protocol (TKIP) and MD-5, SHA-1 Hash Functions for IP
Security
• USB Slave Interface (Control, Interrupt, Bulk-in and Bulk-out Endpoints)
• UART with Support to be used as USART
• Serial Peripheral Interface (SPI) and Two Wire Serial Interface (TWI)
• 64-key Keypad Interface
• 4x4 LED Matrix Controller
• Minimum of 5 GPIO Pins (up to 62 Available on Configuration)
• 208-lead BGA Package
• 1.8 Volt Core Voltage Supply
• 3.3 Volt I/O Voltage Supply
Figure 0-1. Typical Application Using AT76C902
n Usin
Flash
76 CS9R0A2M
Wireless VoIP
Processor
Implementing
the 802.11
Standard
AT76C902
Summary
AT76C902
External
Bus
Interface
ARM946E-S
Protocol Handling
Control
Peripherals
TWI Bus
- Battery Management
- Voltage regulation
- LCD Bias
- Other Phone ASICs
ARM7TDMI
802.11 MAC
802.11
Interface
802.11
PHY
DSP
Subsystem
Audio Codec
Speaker
Microphone
Audio to Headset
Serial Port
Accessory Controls
Battery Charge Voltage
NOTE: This is a summary document.
The complete document is available
under NDA. For more information,
please contact your local Atmel sales
office.
5655AS–VoIP–09/06