User's Manual

Bluegiga Technologies Oy
Page 28 of 52
Figure 18: Short Frame Sync (shown with 16-bit sample)
As with Long Frame Sync, BT111 samples PCM_IN on the falling edge of PCM_CLK and transmits
PCM_OUT on the rising edge. PCM_OUT is configurable as high impedance on the falling edge of PCM_CLK
in the LSB position or on the rising edge.
14.2 Multi-slot Operation
More than 1 SCO connection over the PCM interface is supported using multiple slots. Up to 3 SCO
connections are carried over any of the first 4 slots.
Figure 19: Multi-slot Operation with 2 Slots and 8-bit Companded Samples
14.2.1 GCI Interface
BT111 is compatible with the GCI, a standard synchronous 2B+D ISDN timing interface. The 2 64kbps B
channels are accessed when this mode is configured.