BC41B143A-DS-001PE Datasheet, PDF (75/102 Pages) List of Unclassifed Manufacturers – BlueCpre 4-ROM Single Chip Bluetooth v2.0 System with EDR

Device Terminal Descriptions
10.7.4 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.
LONG_PCM_SYNC
Or
SHORT_PCM_SYNC
PCM_CLK
PCM_OUT
1 2 3 4 5 6 78 1 2 3 4 5 6 78
PCM_IN Do Not Care 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Do Not Care
Figure 10.23: Multi Slot Operation with Two Slots and 8-bit Companded Samples
10.7.5 GCI Interface
BlueCore4-ROM 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.
PCM_SYNC
PCM_CLK
PCM_OUT
1 2 3 4 5 6 78 1 2 3 4 5 6 7 8
PCM_IN
Do Not
C a re
1
23
4
5
67
8
1
2
34
5
6
7
8
Do Not
C a re
B1 Channel
B2 Channel
Figure 10.24: GCI Interface
The start of frame is indicated by the rising edge of PCM_SYNC and runs at 8kHz. With BlueCore4-ROM in
Slave mode, the frequency of PCM_CLK can be up to 4.096MHz.
BC41B143A-ds-001Pe
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Production Information
© Cambridge Silicon Radio Limited 2005
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