BC41B143A-DS-002PD Datasheet, PDF (70/89 Pages) List of Unclassifed Manufacturers – BlueCore 4-ROM CSP EDR Single Chip Bluetooth v2.0 + EDR System

Device Terminal Descriptions
As with Long Frame Sync, BlueCore4-ROM CSP samples PCM_IN on the falling edge of PCM_CLK and
transmits PCM_OUT on the rising edge. PCM_OUT can be configured to be high impedance on the falling edge
of PCM_CLK in the LSB position or on the rising edge.
11.7.4 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 11.21: Multi Slot Operation with Two Slots and 8-bit Companded Samples
11.7.5 GCI Interface
BlueCore4-ROM CSP is compatible with the General Circuit Interface, a standard synchronous 2B+D ISDN
timing interface. The two 64Kbits/s 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 are
1
23 4 5 678 1 2 34 5 6
B1 Channel
B2 Channel
Figure 11.22: GCI Interface
7
8
Do Not
C are
The start of frame is indicated by the rising edge of PCM_SYNC and runs at 8kHz. With BlueCore4-ROM CSP in
Slave mode, the frequency of PCM_CLK can be up to 4.096MHz.
BC41B143A-ds-002Pd
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Production Information
© Cambridge Silicon Radio Limited 2005
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