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5.7.2
Activity on McBSP Pins for Different Values of XMCM
SPRU762B
Figure 37 shows the activity on the McBSP pins for the various XMCM values.
In all cases, the transmit frame is configured as follows:
XPHASE = 0: Single-phase frame (required for multichannel selection
-
modes)
XFRLEN1 = 0000011b: 4 words per frame
-
XWDLEN1 = 000b: 8 bits per word
-
XMCME = 0: 2-partition mode (only partitions A and B used)
-
When XMCM = 11b, transmission and reception are symmetric, which means
the corresponding bits for the receiver (RPHASE, RFRLEN1, RWDLEN1, and
RMCME) must have the same values as XPHASE, XFRLEN1, and
XWDLEN1, respectively.
In the figure, the arrows showing where the various events occur are only
sample indications. Wherever possible, there is a time window in which these
events can occur.
Multichannel Selection Modes
Multichannel Buffered Serial Ports (McBSPs)
69
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