User's Manual

Silicon Laboratories Finland Oy
Page 36 of 51
Figure 29: Short Frame Sync (Shown with 16-bit Sample)
As with Long Frame Sync, WT11u samples PCM_IN on the falling edge of PCM_CLK and transmits PCM_OUT
on the rising edge. PCM_OUT may be configured to be high impedance on the falling edge of PCM_CLK in the
LSB position or on the rising edge.
9.4 Multi-slot Operation
More than one SCO connection over the PCM interface is supported using multiple slots. Up to three SCO
connections can be carried over any of the first four slots.
Figure 30: Multi-slot Operation with Two Slots and 8-bit Companded Samples
9.5 GCI Interface
WT11u is compatible with the GCI, a standard synchronous 2B+D ISDN timing interface. The two 64kbits/s B
channels can be accessed when this mode is configured.