MPC823 datasheet(1/74 Pages) MOTOROLA

номер детали	MPC823

подробное описание детали	Communication Processor Module

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производитель	MOTOROLA [Motorola, Inc]

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Communication Processor Module

MOTOROLA

MPC823 REFERENCE MANUAL

16-379

The expected results are as follows:

• The TX buffer descriptor (Ep0) CONTROL/STATUS field must contain 0x3800.

• The TX buffer descriptor (Ep0) DATA LENGTH field must contain 0x0003.

• The TX buffer descriptor (Ep1) CONTROL/STATUS field must contain 0x3c80.

• The TX buffer descriptor (Ep1) DATA LENGTH field must contain 0x0003.

• The RX buffer descriptor (Ep0) CONTROL/STATUS field must contain 0x3c00.

• The RX buffer descriptor (Ep0) DATA LENGTH field must contain 0x0005.

• The RX buffer descriptor (Ep0) DATA BUFFER field must contain 0xabcd122b,

0x42xxxxxx.

16.11 THE SERIAL MANAGEMENT CONTROLLERS

The serial management controllers (SMCs) consist of two full-duplex ports that can be

independently configured to support any one of three protocols or modes—UART,

Transparent, or general-circuit interface (GCI). Simple UART operation is used to provide a

debug/monitor port in an application, which allows a serial communication controller (SCCx)

to be free for other purposes. The serial management controller clock can be derived from

one of the four internal baud rate generators or from a 16

× external clock pin.

The functionality and performance provided by the SMCx in UART mode is generally less

than that provided by an SCCx in UART mode. The SMCx implementation does not support

such features as special character recognition and detection.

In totally Transparent mode, a serial management controller can use the TDM channel to

connect to a T1 line or directly to the SMC’s set of pins. However, SMC2 does not have its

own set of dedicated pins, so the time-slot assigner pins are its only option. The receive and

transmit clocks are derived from the time-division multiplex (TDM) channel, the internal baud

rate generators, or from an external 1

× clock. The Transparent protocol allows the

transmitter and receiver to use the external synchronization pin.

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