Specifications

53
1
2345678PCM_OUT
PCM_CLK
PCM_SYNC
1
2345678
undefined
PCM_IN
9 101112
13
14 15 16
9 101112
13
14 15 16
undefined
Figure 28: Short frame sync (shown with 16-bit companded sample)
As with Long Frame Sync, WT32 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.
7.4.4 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.
1
2345678PCM_OUT
PCM_CLK
LONG_PCM_SYNC
1
2345678
undefined undefined
PCM_IN
SHORT_PCM_SYNC
OR
Figure 29: Multi slot operation with two slots and 8-bit companded samples
7.4.5 GCI Interface
WT32 is compatible with the General Circuit Interface, a standard synchronous 2B+D ISDN
timing interface. The two 64Kbps B channels can be accessed when this mode is
configured.