CSR8635 查看數據表（PDF） - CSR plc

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CSR8635

The CSR8635 QFN single-chip Bluetooth® audio ROM device targets mid-range stereo speakers and headsets.

CSR plc 

As with Long Frame Sync, CSR8635 QFN samples PCM_IN on the falling edge of PCM_CLK and transmits PCM_OUT

on the rising edge. PCM_OUT is configurable as high impedance on the falling edge of PCM_CLK in the LSB position

or on the rising edge.

9.3.4 Multi-slot Operation

More than 1 SCO connection over the PCM interface is supported using multiple slots. Up to 3 SCO connections are

carried over any of the first 4 slots.

LONG_PCM_SYNC

Or

SHORT_PCM_SYNC

9CchS.a3Rn.8n56e3ls5aQGPreCPFPCCMNaCPPPMc_MICCiCcSP_sP_IMMeYMOnCCrcs_N_eU_LoMtsIOCCpKNeTFme_UaLirdIgpNKTrfDCueaawaordrtNehceiDboetfel9ooen.rN111wtqh3oiiti:tnshCMg22matbuhroeoletdi-Gke3311selCoivstIBe,c22O441naop.CnzsFehf33htiiraagg55oannuutundirroe44eea-nldr669ed.w.x551sict4yhe77:nl26pG6choSC8ri8nloIo77tnIt.nsoct8ouea118smrnfad2.ccB811e22n+-b-Dit22FIC33SriodD33maNBy44p2,taiC44mSnhedia55npen55gndteeinSlm66ta66ebmrefapr7777cl2ee7s.8,T8882h0eD1DCo2ao3rNeN6oto4tkCbaprse B

The start of frame is indicated by the rising edge of PCM_SYNC and runs at 8kHz.

9.3.6 Slots and Sample Formats

CSR8635 QFN receives and transmits on any selection of the first 4 slots following each sync pulse. Slot durations are

either 8 or 16 clock cycles:

■ 8 clock cycles for 8-bit sample formats.

■ 16 clock cycles for 8-bit, 13-bit or 16-bit sample formats.

CSR8635 QFN supports:

■ 13-bit linear, 16-bit linear and 8-bit µ-law or A-law sample formats.

■ A sample rate of 8ksps.

■ Little or big endian bit order.

■ For 16-bit slots, the 3 or 8 unused bits in each slot are filled with sign extension, padded with zeros or a

programmable 3-bit audio attenuation compatible with some codecs.

Production Information

© Cambridge Silicon Radio Limited 2013

Confidential Information - This Material is Subject to CSR's Non-disclosure Agreement

Page 48 of 105

CS-303725-DSP5

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