BC41B143A-ds-003Pc CSR, BC41B143A-ds-003Pc Datasheet - Page 70

• Manufacturer Part Number: BC41B143A-ds-003Pc
• Description: Blue Core ROM Plug-n-Go
• Manufacturer: CSR

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.
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
PCM_OUT
PCM_OUT
PCM_OUT
PCM_OUT
1
1
1
1
Extension
Sign
2
2
2
2
Figure 10.24: 16-Bit Slot Length and Sample Formats
3
3
3
3
A 16-bit slot with 8-bit companded sample and sign extension selected.
A 16-bit slot with 13-bit linear sample and audio gain selected.
A 16-bit slot with 8-bit companded sample and zeros padding selected.
A 16-bit slot with 13-bit linear sample and sign extension selected.
Extension
4
4
4
4
Sample
Sign
8-Bit
© Cambridge Silicon Radio Limited 2005
5
5
5
5
Advance Information
6
6
6
6
Sample
13-Bit
7
7
7
7
8
8
8
8
9
9
9
9
Sample
13-Bit
10
10
10
10
11
11
11
11
12
12
12
12
Padding
Sample
Zeros
8-Bit
13
13
13
13
14
14
14
14
Device Terminal Descriptions
Audio
Gain
15
15
15
15
16
16
16
16
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