SPRUHX5I August 2014 – May 2024 TMS320F28374S , TMS320F28375S , TMS320F28375S-Q1 , TMS320F28376S , TMS320F28377S , TMS320F28377S-Q1 , TMS320F28378S , TMS320F28379S
McBSP, in its normal mode, communicates with various types of Codecs with variable word size. Apart from this mode, the McBSP uses time-division multiplexed (TDM) data stream while communicating with other McBSPs or serial devices. The multichannel mode provides flexibility while transmitting/receiving selected channels or all the channels in a TDM stream.
Table 20-75 provides a quick reference to McBSP mode selection.
No. | McBSP Word Size |
Register Bits Used for Mode Selection | Mode and Function Description | |||
---|---|---|---|---|---|---|
MCR1 bit 9,0 | MCR2 bit 9,1,0 | |||||
RMCME | RMCM | XMCME | XMCM | |||
Normal Mode | ||||||
1 | 8/12/16/20/24/32 bit words | 0 | 0 | 0 | 0 | All types of Codec interface will use this selection |
Multichannel Mode | ||||||
2 | 8-bit words | 2 Partition or 32-channel Mode | ||||
0 | 1 | 0 | 1 | All channels are disabled, unless selected in X/RCERA/B | ||
0 | 1 | 0 | 10 | All channels are enabled,but masked unless selected in X/RCERA/B | ||
0 | 1 | 0 | 11 | Symmetric transmit, receive | ||
8 Partition or 128 Channel Mode Transmit/Receive | ||||||
Channels selected by X/RCERA to X/RCERH bits | ||||||
Multichannel Mode is ON | ||||||
1 | 1 | 1 | 1 | All channels are disabled, unless selected in XCERs | ||
1 | 1 | 1 | 10 | All channels are enabled, but masked unless selected in XCERs | ||
1 | 1 | 1 | 11 | Symmetric transmit, receive | ||
Continuous mode, transmit | ||||||
1 | 0 | 1 | 0 | Multi-Channel Mode is OFF | ||
All 128 channels are active and enabled |