BC41B143A-DS-003PC Datasheet, PDF (70/94 Pages) List of Unclassifed Manufacturers – BlueCore 4-ROM Plug-n-Go Single Chip Bluetooth v2.0 + EDR System

Device Terminal Descriptions
10.7.6 Slots and Sample Formats
BlueCore4-ROM Plug-n-Go can receive and transmit on any selection of the first four slots following each sync pulse.
Slot durations can be either 8 or 16 clock cycles. Durations of 8 clock cycles may only be used with 8-bit sample
formats. Durations of 16 clocks may be used with 8-bit, 13-bit or 16-bit sample formats.
BlueCore4-ROM Plug-n-Go supports 13-bit linear, 16-bit linear and 8-bit µ-law or A-law sample formats. The sample
rate is 8ksamples/s. The bit order may be little or big endian. When 16-bit slots are used, the 3 or 8 unused bits in each
slot may be filled with sign extension, padded with zeros or a programmable 3-bit audio attenuation compatible with
some Motorola CODECs.
PCM_OUT
Sign
Extension
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
8-Bit
Sample
A 16-bit slot with 8-bit companded sample and sign extension selected.
PCM_OUT
8-Bit
Sample
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Zeros
Padding
A 16-bit slot with 8-bit companded sample and zeros padding selected.
PCM_OUT
Sign
Extension
1 2 3 4 5 6 7 8 9 10 11 12 13 14
13-Bit
Sample
A 16-bit slot with 13-bit linear sample and sign extension selected.
15 16
PCM_OUT
13-Bit
Sample
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Audio
Gain
A 16-bit slot with 13-bit linear sample and audio gain selected.
Figure 10.24: 16-Bit Slot Length and Sample Formats
10.7.7 Additional Features
BlueCore4-ROM Plug-n-Go has a mute facility that forces PCM_OUT to be 0. In master mode, PCM_SYNC may also
be forced to 0 while keeping PCM_CLK running which some CODECS use to control power down.
BC41B143A-ds-003Pc
Advance Information
© Cambridge Silicon Radio Limited 2005
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