Freescale-semiconductor MPC8260 Bedienungsanleitung PDF herunterladen (Seite 98)

Overview

MPC8260 PowerQUICC II Family Reference Manual, Rev. 2

1-4 Freescale Semiconductor

– Transparent

– UART (low-speed operation)

— One serial peripheral interface identical to the MPC860 SPI

— One I

C controller (identical to the MPC860 I

C controller)

– Microwire compatible

– Multiple-master, single-master, and slave modes

— Up to eight TDM interfaces (four on the MPC8250 and the MPC8255)

– Supports two groups of four TDM channels for a total of eight TDMs (one group of four on

the MPC8250 and the MPC8255)

– 2,048 bytes of SI RAM

– Bit or byte resolution

– Independent transmit and receive routing, frame synchronization.

– Supports T1, CEPT, T1/E1, T3/E3, pulse code modulation highway, ISDN basic rate, ISDN

primary rate, Freescale interchip digital link (IDL), general circuit interface (GCI), and

user-defined TDM serial interfaces

— Eight transfer transmission convergence (TC) layers between the TDMs and FCC2 to support

inverse multiplexing for ATM capabilities (IMA) (MPC8264 and MPC8266 only)

— Eight independent baud rate generators and 20 input clock pins for supplying clocks to FCC,

SCC, and SMC serial channels

— Four independent 16-bit timers that can be interconnected as two 32-bit timers

• TC layer (MPC8264 and MPC8266 only)

— Each of the 8 TDM channels is routed in hardware to a TC layer block

– Protocol-specific overhead bits may be discarded or routed to other controllers by the SI

– Performing ATM TC layer functions (according to ITU-T I.432)

– Transmit (Tx) updates

– Cell HEC generation

– Payload scrambling using self synchronizing scrambler (programmable by the

user)

– Coset generation (programmable by the user)

– Cell rate by inserting idle/unassigned cells

– Receive (Rx) updates

– Cell delineation using bit by bit HEC checking and programmable ALPHA and

DELTA parameters for the delineation state machine

– Payload descrambling using self synchronizing scrambler (programmable by the

user)

– Coset removing (programmable by the user)

– Filtering idle/unassigned cells (programmable by the user)

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Freescale-semiconductor MPC8260 Bedienungsanleitung Seite 98