Multichannel Serial Interfaces; Communication Protocol; Configuration Parameters; Slave/Master Control - Texas Instruments OMAP5912 Reference Manual

Multimedia processor device overview and architecture

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Multichannel Serial Interfaces

Serial Interfaces

Multichannel serial interfaces (MCSIs) have multichannel transmission

capability. MCSIs expand the parallel interface of a DSP to connect to external

devices such as codecs and GSM system simulators.

The two public MCSIs on the device provide full duplex transmission and

master or slave clock control. All transmission parameters are configurable to

cover the maximum number of operating conditions:

Master or slave clock control (transmission clock and frame

synchronization pulse)

Programmable transmission clock frequency

Single-channel or multichannel (x16) frame structure

Programmable word length: 3 to 16 bits

Full-duplex transmission

Programmable frame configuration

Continuous or burst transmission

Normal or alternate framing

Normal or inverted frame polarity

Short or long frame pulse

Programmable oversize frame length

Programmable frame length

Programmable interrupt occurrence time (TX and RX)

Error detection with interrupt generation on wrong frame length

DMA support for both TX and RX data transfers

The configuration parameters can be modified only if the MCSI is disabled

(CONTROL_REG[0] = 0).

Using the control bit, the interface can be configured in one of two ways:

In master mode, with the transmission clock and the frame

synchronization pulse generated by the interface

In slave mode, with the transmission clock and the frame synchronization

pulse generated from an external device

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