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Ultra Wideband(UWB) MAC  -  32-bit Embedded ASIC Core Peripheral  -  Atmel  -  ASIC

Features
• Ultra Wideband (UWB) Media Access Control (MAC) layer based on WiMedia ECMA-368 standard
– Bidirectional TDMA based UWB Communication
– No Master and Slave devices, all network participants have equal rights
– Ad Hoc Network
• Distributed Reservation Protocol guarantees fixed bandwith and throughput
– Important for isochronous transfers like video
– Communications channels to exclusively reserve a portion of the Super Frame for its own usage.
• Prioritized, contention-based channel access mechanism
– Collision Sense Multiple Access scheme
– Ensures Equitable sharing of Bandwidth
• Integrates into Atmel® CAP™ via multilayered AHB bus
• UWB-PHY interface according to ECMA-369 standard
– Defines interface to multi vendor UWB-PHY modules and PHY-ICs
• Firmware Programmable Scheduling Processor
– Flexible scheduling of frame transmission and reception
– Provides device power management
• Firmware Beacon Processing
– Firmware controlled hardware accelerated UWB-MAC layer communication
– Beacon communication is hidden from application
– Firmware controlling increases flexibility
• Automatic Device Synchronisation
– Automatically synchronizes its Timer (BPST) with other devices according to ECMA-368
• Optimized Isochronous Data Transfers
– The Application may request a fixed bandwidth for transmit/receive operations. Isochronous transfers work with No-ACK Acknowledge Policy. Resource management is done in the Firmware.
• Multi-Data-Rate
– The MAC can handle all data rates between 53.3 Mbit/sec and480 Mbit/sec.

Description
The UWB-MAC is designed for easy integration into embedded Microcontrollers. Since it interfaces to the AHB and APB Buses, it is especially suited for ARM® or Cortex® based SoCs. The UWB-MAC provides hardware support for ECMA-368 (WiMedia) Media Access Layer specification.
Most MAC functions are under software control by the sam e Microcontroller which is already part of the SoC. The interface to the radio module is compliant to the ECMA-369 MACPHY interface standard which is supported by UWB-PHYs like the Wionics, Realtek RTU7010 and 7012.
Many parameters of the UWB standard are controlled by the microcontroller firmware, which requires no hardware changes if other higher level protocols need to be added, e.g. Wireless USB. Implementation in firmware also lowers the risk and adds flexibility in case of specification changes.
UWB devices based on the UWB-MAC can transfer data to and from any other UWB device.
The UWB-MAC is designed as a bus master and transfers data between UWB-PHY and the AHB bus and vice versa, such that data end points could be in microcontroller memory which may be either internal microcontroller RAM or external mass storage.
Upper layer functionality like wireless USB can be implemented in software by utilizing the USB host and device blocks of the microcontroller.