Freescale Semiconductor PowerQUICC MPC885 Reference Manual page 103

— Totally transparent (bit streams)
— Totally transparent (frame based with optional cyclic redundancy check (CRC))
• Up to two serial management channels (SMCs) supporting the following protocols:
— UART
— Transparent
— General circuit interface (GCI) controller
— Can be connected to the time-division multiplexed (TDM) channel
• Universal serial bus (USB) — Supports operation as a USB function endpoint, a USB host
controller or both for testing purposes (loop-back diagnostics)
— USB 2.0 full/low-speed compatible
— The USB function mode features are as follows:
– Four independent endpoints support control, bulk, interrupt, and isochronous data transfers
– CRC16 generation and checking
– CRC5 checking
– NRZI encoding/decoding with bit stuffing
– 12- or 1.5-Mbps data rate
– Flexible data buffers with multiple buffers per frame
– Automatic retransmission upon transmit error
— The USB host controller features are as follows:
– Supports control, bulk, interrupt, and isochronous data transfers
– CRC16 generation and checking
– NRZI encoding/decoding with bit stuffing
– Supports both 12- and 1.5-Mbps data rates (automatic generation of preamble token and
data rate configuration). Note that low-speed operation requires an external hub.
– Flexible data buffers with multiple buffers per frame
– Supports local loopback mode for diagnostics (12 Mbps only)
• One SPI (serial peripheral interface)
— Supports master and slave modes
— Supports multiple master operation on the same bus
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• One I C (inter-integrated circuit) port
— Supports master and slave modes
— Multiple-master environment support
• Time-slot assigner (TSA) (supports two TDMs on the MPC885 and the MPC880 and one TDM on
the MPC875)
— Allows SCCs and SMCs to run in multiplexed and/or non-multiplexed operation
— Supports T1, CEPT, PCM highway, ISDN basic rate, ISDN primary rate, and user-defined
— one- or eight-bit resolution
— Allows independent transmit and receive routing, frame synchronization, and clocking
Freescale Semiconductor
MPC885 PowerQUICC Family Reference Manual, Rev. 2
MPC885 Overview
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