Communication Protocol - Texas Instruments OMAP5910 Technical Reference Manual

Multichannel Serial Interfaces
9.5.1

Communication Protocol

9.5.1.1 Configuration Parameters
Slave/Master Control
Single-Channel/Multichannel
Short/Long Framing
9-28
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
Control bit:
MAIN_ PARAMETERS _REG(6) = MCSI_MODE
1: Master
0: Slave
The frame structure can be either single-channel-based (one channel per
frame) or multichannel-based with the number of channels fixed at 16.
Control bit:
MAIN_ PARAMETERS _REG(7) = MULTI
1: Multichannel
0: Single-channel
The frame-synchronization pulse duration can be either short with a pulse
duration equal to the bit duration or long with a pulse duration equal to the
channel duration.
The long frame is active only during transmission on channel 0.
Control bit:
MAIN_ PARAMETERS _REG(8) = FRAME_SIZE
1: Long
0: Short