User's Manual

FLC-BTM805 Datasheet
Flaircomm Microelectronics Confidential
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Figure 5: Configured PCM as a Master
Figure 6: Configured PCM as a Slave
4.3.1.2 Long Frame Sync
Long Frame Sync is the name given to a clocking format that controls the transfer of PCM data
words or samples. In Long Frame Sync, the rising edge of PCM_SYNC indicates the start of the
PCM word. When BTM805 is configured as PCM master, generating PCM_SYNC and PCM_CLK,
then PCM_SYNC is 8-bits long. When BTM805 is configured as PCM Slave, PCM_SYNC is from
1 cycle PCM_CLK to half the PCM_SYNC rate.