BC352239A Datasheet, PDF (81/116 Pages) List of Unclassifed Manufacturers – BlueCore 3-Multimedia External

Device Terminal Descriptions
8.8.15 Slots and Sample Formats
BlueCore3-Multimedia External 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. Duration’s of 8 clock cycles may only be used with
8-bit sample formats. Durations of 16 clocks may be used with 8, 13 or 16-bit sample formats.
BlueCore3-Multimedia External 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 15 16
13-Bit
Sample
A 16-bit slot with 13-bit linear sample and sign extension selected.
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 8.17: 16-Bit Slot Length and Sample Formats
8.8.16 Additional Features
BlueCore3-Multimedia External 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.
BC352239A-ds-001Pc
© Cambridge Silicon Radio Limited 2004
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