2024年4月24日发(作者：法霞影)
元器件交易网
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 l Application Using AT76C902
Flash
n Usin76C9
SRAM
02
AT76C902
External
Bus
ARM7TDMI
Interface
802.11 MAC
802.11
802.11
ARM946E-S
Interface
PHY
Protocol Handling
Control
Subsystem
DSP
Peripherals
Audio Codec
Speaker
TWI Bus
Microphone
Audio to Headset
- Battery Management
Serial Port
- Voltage regulation
- LCD Bias
Accessory Controls
- Other Phone ASICs
Battery Charge Voltage
Wireless VoIP
Processor
Implementing
the 802.11
Standard
AT76C902
Summary
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
元器件交易网
ption
AT76C902 is a highly integrated ASSP that can be used as part of a wireless phone that utilizes
an 802.11a/b/g wireless LAN medium and carries voice over IP (VoIP) packets. Specified in this
datasheet, an ARM
®
processor based subsystem performs all of the PLCP and low MAC func-
tions and baseband operations defined in 802.11a/b/g. A TeakDSPCore™and an internal
CODEC perform the decoding and encoding of voice traffic. An interrupt controller and multiple
support peripherals are also included.
1.1Applications
The VoIP baseband device is intended to be used in a wireless phone which operates by encap-
sulating 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 802.11a/b/g wireless LAN at 2.4 GHz and at 5.2 GHz (using 802.11a).
Figure 0-1 shows an example of the device being utilized in a wireless phone.
2
AT76C902 Summary
5655AS–VoIP–09/06
2024年4月24日发(作者：法霞影)
元器件交易网
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 l Application Using AT76C902
Flash
n Usin76C9
SRAM
02
AT76C902
External
Bus
ARM7TDMI
Interface
802.11 MAC
802.11
802.11
ARM946E-S
Interface
PHY
Protocol Handling
Control
Subsystem
DSP
Peripherals
Audio Codec
Speaker
TWI Bus
Microphone
Audio to Headset
- Battery Management
Serial Port
- Voltage regulation
- LCD Bias
Accessory Controls
- Other Phone ASICs
Battery Charge Voltage
Wireless VoIP
Processor
Implementing
the 802.11
Standard
AT76C902
Summary
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
元器件交易网
ption
AT76C902 is a highly integrated ASSP that can be used as part of a wireless phone that utilizes
an 802.11a/b/g wireless LAN medium and carries voice over IP (VoIP) packets. Specified in this
datasheet, an ARM
®
processor based subsystem performs all of the PLCP and low MAC func-
tions and baseband operations defined in 802.11a/b/g. A TeakDSPCore™and an internal
CODEC perform the decoding and encoding of voice traffic. An interrupt controller and multiple
support peripherals are also included.
1.1Applications
The VoIP baseband device is intended to be used in a wireless phone which operates by encap-
sulating 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 802.11a/b/g wireless LAN at 2.4 GHz and at 5.2 GHz (using 802.11a).
Figure 0-1 shows an example of the device being utilized in a wireless phone.
2
AT76C902 Summary
5655AS–VoIP–09/06