mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 801

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

16.10.1 Features
The following list summarizes the USB slave mode features:
The following list summarizes the USB host controller features:
16.10.2 Controller Limitations
The following tasks are not supported by the hardware and must be implemented by
software:
• Supports USB slave mode
• Four independent endpoints support control, bulk, interrupt and isochronous data
• CRC16 generation and checking
• NRZI encoding/decoding with bit stuffing
• 12 or 1.5Mbps data rate
• Flexible data buffers with multiple buffers per frame
• Automatic retransmission upon transmit error
• Supports control, bulk, interrupt, and isochronous data transfers
• CRC16 generation and checking
• NRZI encoding/decoding with bit stuffing
• 12 and 1.5Mbps data rates (automatic generation of PRE token and data rate
• Flexible data buffers with multiple buffers per frame
• Supports local loopback mode for diagnostics (12Mbps only)
• CRC5 generation for token packets. Since CRC5 is calculated on 11 bits, this must not
• Retransmission after an error and error recovery.
• Generation and transmission of SOF token every 1ms.
• Scheduling the various transfers within frame and between frames.
• The MPC823 USB host controller does not integrate the root hub. An external hub is
• The host controller programming model is very similar to the function endpoint
transfers
configuration)
impose a large CPU overhead.
required when more than one device is connected to the host.
programming model and does not conform to the Open Host Controller Interface
(OHCI). Although Motorola plans to support full host functionality, our implementation
will not be OHCI or UHCI (Universal Host Controller Interface) compatible. Those
standards define the software programming model so that software drivers can be
hardware-independent. Our implementation has a much more simplified software
interface.
Freescale Semiconductor, Inc.
For More Information On This Product,
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
Communication Processor Module
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