bc41b143a07 ETC-unknow, bc41b143a07 Datasheet - Page 74

• Manufacturer Part Number: bc41b143a07
• Description: Single Chip Bluetooth
• Manufacturer: ETC-unknow

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.
9.7.6
BlueCore4-ROM 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 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.
CS-101564-DSP12
PCM_SYNC
Slots and Sample Formats
PCM_OUT
PCM_CLK
PCM_IN
Do Not
Care
1
1
2
2
3
3
B1 Channel
4
4
Figure 9.21: GCI Interface
Production Information
5
5
© CSR plc 2003-2007
6
6
7
7
8
8
1
1
2
2
3
3
B2 Channel
4
4
5
5
6
6
Device Terminal Descriptions
7
7
8
8
Do Not
Care
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