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  • CSR (Qualcomm) Bluetooth Chips and Their Bluetooth Versions: A Reference

CSR (Qualcomm) Bluetooth Chips and Their Bluetooth Versions: A Reference

Jul 22, 2026 | 0 comments posted by Vincent Zhang

PUBLISHED BY IWISTAO · Technology / Wireless Audio

From the BlueCore era to the Qualcomm QCC and Snapdragon Sound platforms — which Bluetooth specification each CSR / Qualcomm chip implements, and what a version number does and does not guarantee.

Cambridge Silicon Radio (CSR) was, for over a decade, one of the leading suppliers of Bluetooth silicon. Qualcomm announced its acquisition of CSR in October 2014 and completed it on August 13, 2015, with the business renamed Qualcomm Technologies International, Ltd. (QTIL).[4] The product families CSR built — BlueCore, CSR8xx, CSR86xx — and the QCC series and Snapdragon Sound / S1 platforms that followed under Qualcomm together make up a large share of the Bluetooth audio and connectivity silicon on the market.

This guide maps each major CSR / Qualcomm chip family to the Bluetooth specification version it implements. It is a reference, not an exhaustive datasheet: Qualcomm's audio portfolio spans dozens of part numbers, and new platforms (e.g., the S-series and S1-series Sound Platforms) continue to ship. Where a claim rests on a distributor or third-party page rather than a Qualcomm primary document, it is flagged as such.

Table of Contents

  1. Bluetooth Versions at a Glance
  2. The BlueCore Era: CSR's Foundation (BC1–BC6)
  3. The CSR8xx and CSR10xx Families
  4. The CSR86xx Audio SoCs (CSR8615, 8635, 8645, 8670, 8675) & the CSRA64xx ROM line (CSR64215)
  5. The Qualcomm QCC Series (QCC300x, QCC30xx, QCC51xx)
  6. Newer Platforms: Snapdragon Sound / S1 (Bluetooth 6.0+)
  7. Quick Reference: Chip-to-Bluetooth-Version Matrix
  8. What a "Bluetooth Version" Does and Doesn't Tell You
  9. How to Choose the Right Chip
  10. Frequently Asked Questions

Bluetooth Versions at a Glance

Before mapping chips to versions, recall what each Bluetooth Core specification step delivered. Note that several headline user features — most importantly LE Audio — are separate specifications built on top of a Core version, not part of the Core release itself (see the feature caveat).

Specification Year Headline capability at the Core level
Bluetooth 1.1 / 1.2 2001 / 2003 First interoperable baseline; 1.2 adds adaptive frequency hopping
Bluetooth 2.0 + EDR 2004 Enhanced Data Rate (~3 Mbps)
Bluetooth 2.1 + EDR 2007 Secure Simple Pairing, extended inquiry response
Bluetooth 3.0 + HS 2009 High-speed via 802.11 AMP
Bluetooth 4.0 2010 Introduces Bluetooth Low Energy (LE)
Bluetooth 4.1 / 4.2 2013 / 2014 Coexistence; LE data length extension, privacy
Bluetooth 5.0 2016 4× range, 2× speed, 8× advertising capacity
Bluetooth 5.1 2019 Direction finding (AoA / AoD)
Bluetooth 5.2 2020 LE Isochronous Channels (the foundation that enables LE Audio), EATT, LE Power Control
Bluetooth 5.3 2021 Periodic Advertising enhancements (ADI), Connection Subrating, Encryption Key Size change
Bluetooth 5.4 2023 PAwR (Periodic Advertising with Responses), Encrypted Advertising Data
Bluetooth 6.0 2024 Channel Sounding (secure two-way ranging)[6]
Bluetooth 6.1 2025 Randomized RPA (Resolvable Private Address) Updates[19]
Bluetooth 6.2 2025 Shorter Connection Intervals; Channel Sounding amplitude-based attack resilience; HCI USB LE Isochronous Support; LE Test Mode enhancements[20]
Bluetooth 6.3 2026 Ranging precision (Channel Sounding inline PCT transfer, PHY-specific RTT accuracy); HCI capacity expansion (Running Out of Bits); RF requirement alignment (ACP / C/I limit relaxation)[21]

The exact adoption dates and feature lists are maintained by the Bluetooth SIG.[6]

The BlueCore Era: CSR's Foundation (BC1–BC6)

CSR's original BlueCore family carried Bluetooth from its earliest days through the 2.1 + EDR generation. BlueCore1 (BlueCore01) launched around 2000 and is widely credited as the first true single-chip Bluetooth device; it operated in the Bluetooth 1.0B era — the BlueCore01 data sheet predates the adoption of Bluetooth Core 1.1 in February 2001.[5b][6] An EE Times teardown documents the version compliance of the later numbered generations:

  • BlueCore 2 (BC2) and BlueCore 3 (BC3) — compliant with Bluetooth v1.1 and v1.2, built on a 0.18-µm RF CMOS process.[5]
  • BlueCore 4 (BC4) — compliant with Bluetooth v2.0 + EDR.[5]
  • BlueCore 5 (BC5 / BlueCore 5 Media) — compatible with Bluetooth v2.1 + EDR and backward-compatible with v2.0 + EDR; added an integrated 64-MIPS Kalimba DSP and stereo codec.[5]
  • BlueCore 6 (BC6) — the CSR 61xx series — this generation is marketed as the CSR 61xx family of single-chip mono-headset ROM devices (e.g., BC6110, BC6130, BC6140, BC6145, BC6150). All are qualified to Bluetooth v2.1 + EDR with extended SCO (eSCO); CSR's AuriStream (ADPCM) voice codec debuted here, cutting power versus legacy CVSD.[5][22] A third-party selection guide notes the BC6145 variant can be configured up to Bluetooth 3.0 and adds A2DP — treat that as a variant-specific claim, not a blanket BC6 figure.[2]
  • BlueCore 7 (BC7) — the CSR 65xx series — launched in 2008 as CSR's seventh-generation BlueCore and its most highly integrated part. The 65xx family (e.g., BC6540 / BC6570 / BC6590 class devices) is the first single chip to combine Bluetooth v2.1 + EDR with Bluetooth low energy (then branded "ULP Bluetooth" / Wibree), plus eGPS and FM transmit/receive. It kept the AuriStream voice codec and added in-built speaker drivers; note that the "Bluetooth low energy" here predates the formal Bluetooth 4.0 LE branding, so it is best described as an early/legacy LE implementation rather than a 4.0-qualified dual-mode stack.[24][25]

The 61xx / BC6 family was the workhorse of early mono Bluetooth headsets and hands-free car kits, where its low cost and long battery life mattered most. (Stereo speakers and USB dongles came later, with the CSR86xx and CSR8510 generations.)

The CSR8xx and CSR10xx Families

After the numbered BlueCore generations, CSR rebranded its silicon under the "CSR8xx" banner, and introduced a dedicated Low Energy line:

  • CSR8510 — a dual-mode controller widely used in USB Bluetooth 4.0 dongles. Third-party documentation describes it as compliant with the Bluetooth 4.0 specification (dual-mode: Classic + LE) and backward-compatible with 2.0, 2.1, and 3.0; this is consistent with CSR's positioning of the CSR8xx generation as its first 4.0 dual-mode line.[7]
  • CSR101x family (CSR1010 / CSR1011 / CSR1012 / CSR1013) — Qualcomm's own product page qualifies the CSR1010 to Bluetooth 4.1 (single-mode LE).[15]
  • CSR102x family (CSR1020 and others) — these parts are documented by Qualcomm as configurable with a Bluetooth stack up to 4.2 in some implementations, so the CSR10xx generation should not be collapsed into a single "4.0/4.1" label. The earlier CSR101x is 4.1; the CSR102x can reach 4.2 depending on the qualified stack.

The CSR86xx Audio SoCs (CSR8615, 8635, 8645, 8670, 8675)

The CSR86xx portfolio is where CSR's audio reputation was cemented. Bluetooth versions across this family vary by member:

  • CSR8615 — Qualcomm lists this ROM audio device at Bluetooth 4.1 (targeted at 1-mic mono speakers / headsets / car kits).[13]
  • CSR8635 — Qualcomm's current product page lists this part at Bluetooth 4.1 (dual-mode audio). Some older third-party / distributor listings show 4.0; where they differ, the Qualcomm page is the authoritative source.[18]
  • CSR8645 — the older Qualcomm product brief states "Bluetooth 4.0 specification compliant" / "Bluetooth v4.0 firmware" (dual-mode ROM audio platform with aptX and cVc).[12] Qualcomm's current product page, however, lists the specification field as Bluetooth 4.1. As with CSR8675, treat the qualified version per the specific brief / firmware you are using.[18b]
  • CSR8670 — dual-mode Bluetooth v4.2 firmware; 80 MHz Kalimba DSP; aptX, aptX Low Latency, AAC, SBC, MP3; 16 Mb integrated flash. Qualcomm's product brief explicitly lists "Bluetooth v4.2 firmware."[1]
  • CSR8675 — Qualcomm's CSR8675 product brief lists Bluetooth version 4.2 (120 MHz Kalimba DSP; aptX HD; dedicated hardware ANC).[3] A caveat: some Qualcomm web pages present inconsistent specification fields for this part (e.g., a "5.0" value in one field versus "4.2" in the brief's Features section). Because of that inconsistency, treat "CSR8675 = Bluetooth 4.2" as the figure from the official product brief and firmware version, and verify the exact qualified version against the specific brief and firmware you are using rather than assuming 5.x support.

Note — the CSRA64xx ROM audio line (e.g., CSR64215). Parallel to the programmable CSR86xx parts, CSR also shipped a family of ROM-only stereo audio SoCs branded CSRA64xx (e.g., CSR64215 / CSRA64215, plus CSRA64110, CSRA64210). These are Bluetooth v4.2 single-chip ROM solutions with an 80 MHz RISC MCU and an 80 MIPS Kalimba DSP, built for TrueWireless Stereo (TWS), stereo headsets/speakers, and car audio. They support aptX, aptX Low Latency, AAC, SBC and the sixth-generation cVc voice enhancement. Because they are ROM-masked (not flash-programmable like the CSR8670/8675), they are not field-upgradable to a new Core version — but that is a hardware limitation of the ROM part, consistent with the field-upgrade note earlier in this article.[26]

The Qualcomm QCC Series (QCC300x, QCC30xx, QCC51xx)

Under Qualcomm, the audio roadmap moved to the QCC brand. Version splits within a family matter, so they are stated explicitly:

  • QCC300x (QCC3001–QCC3008, entry-level flash audio SoCs) — Qualcomm's product brief qualifies the family to Bluetooth 5.0.[14]
  • QCC30xx — per Qualcomm's QCC30xx brief: QCC302x / QCC303x → 5.1; QCC304x → 5.2; QCC305x / QCC307x → 5.3; QCC308x / QCC309x → 5.4. The 307x/308x/309x parts are designed for LE Audio use cases.[8]
  • QCC51xx — per Qualcomm's QCC5100 series brief, the split is: QCC512x → 5.1; QCC514x → 5.2; QCC515x and QCC517x → 5.3; QCC5181 → 5.4. The QCC517x / QCC518x parts are designed to support the LE Audio standard.[11]

Newer Platforms: Snapdragon Sound / S1 (Bluetooth 6.0+)

The "QCC" naming is no longer the top of Qualcomm's audio stack. The Snapdragon Sound and S-series / S1-series Sound Platforms extend well beyond Bluetooth 5.4:

  • Qualcomm S1 Gen 1 Sound Platform (QCC1228) — Qualcomm's product page lists Bluetooth 6.0, targeting value-tier true-wireless earbuds with aptX and Adaptive ANC.[10]
  • Snapdragon S5 / S7 series — newer S7 Sound Platforms are documented with a Bluetooth 6.2 radio and LE Audio / Auracast experiences.[17]

So as of 2026, the newest Qualcomm audio silicon is listed with a Bluetooth 6.x specification version (e.g., a Bluetooth 6.2 radio on the S7 platforms, Bluetooth 6.0 on the S1 Gen 1) rather than topping out at 5.4.

BlueCore BT 1.0B–2.1 BC1–BC7 CSR8xx / 10xx BT 4.0–4.2 8510 / 101x / 102x CSR86xx BT 4.0–4.2 8615–8675 QCC30xx / 51xx BT 5.0–5.4 300x–518x S1 / S7 BT 6.0–6.2 QCC1228, S7 CSR founded 1998 · Acquired by Qualcomm Aug 2015

Figure 1: The CSR → Qualcomm Bluetooth silicon lineage and the specification range each generation spans.

Quick Reference: Chip-to-Bluetooth-Version Matrix

Family / Part Bluetooth version Typical use
BlueCore 1 (BC1 / BlueCore01) 1.0B (2000) First single-chip BT modules
BlueCore 2 / 3 (BC2/BC3) 1.1 / 1.2 Early headsets, data modules
BlueCore 4 (BC4) 2.0 + EDR USB dongles, data links
BlueCore 5 (BC5) 2.1 + EDR Stereo headsets, speakers
BlueCore 6 / CSR 61xx (BC6110 / 6130 / 6140 / 6145 / 6150) 2.1 + EDR (eSCO); BC6145 to 3.0 Mono headsets, hands-free kits
BlueCore 7 / CSR 65xx (BC6540 / 6570 / 6590 class) 2.1 + EDR + early Bluetooth low energy; + eGPS + FM Mobile phone connectivity hub
CSR8510 4.0 (dual-mode) USB Bluetooth adapters
CSR101x 4.1 (LE) Sensors, beacons, peripherals
CSR102x up to 4.2 (LE) LE peripherals (config-dependent)
CSR8615 4.1 Mono headsets, car kits, speakers
CSR8635 4.1 (per Qualcomm page; some listings 4.0) Stereo headsets, speakers
CSR8645 4.1 (current page; old brief / firmware 4.0) Mid-tier wireless audio
CSR8670 4.2 Premium wireless audio
CSR8675 4.2 (per brief; see field caveat) ANC premium headphones
CSR64215 (CSRA64xx ROM audio) 4.2 TWS / stereo headsets / speakers / car audio
QCC300x (3001–3008) 5.0 Entry-level headsets / speakers
QCC302x / 303x 5.1 Entry true-wireless earbuds
QCC304x 5.2 Mid true-wireless, ANC
QCC305x 5.3 Snapdragon Sound (mid true-wireless)
QCC307x 5.3 Snapdragon Sound, LE Audio
QCC308x / 309x 5.4 LE Audio / Auracast
QCC512x 5.1 Premium earbuds / headsets
QCC514x 5.2 Premium, Snapdragon Sound
QCC515x / 517x 5.3 LE Audio-ready premium
QCC5181 5.4 LE Audio-ready premium
S1 Gen 1 (QCC1228) 6.0 Value-tier true-wireless
Snapdragon S7 series 6.2 Flagship, LE Audio / Auracast
Read the matrix with care: a "Bluetooth version" column shows the Core specification a part is qualified against. It does not by itself prove support for any specific higher-layer feature. LE Audio, the LC3 codec, Isochronous Channels, and Auracast are qualified separately (e.g., under BAP, PBP, and related specifications). See the next section.

What a "Bluetooth Version" Does and Doesn't Tell You

It is tempting to read a version number as a checklist of features. The Bluetooth SIG is explicit that most capabilities are optional,[16b] and a Core version alone does not prove a product supports a given function. Two common confusions:

  • LE Audio is not "Bluetooth 5.3" or "5.4." LE Audio is built on the LE Isochronous Channels introduced in Bluetooth Core 5.2. A chip qualified to 5.2 (or 5.3/5.4) may implement LE Audio, but only if it has also passed the relevant separate qualifications (BAP, PBP, LC3, etc.). A "5.2-qualified" radio is therefore not automatically LE-Audio-capable.[16a]
  • Auracast is part of the LE Audio specification set, not a Bluetooth 5.4 feature. Auracast broadcast audio is enabled by LE Audio qualifications (notably PBP); it is not a Core 5.4 addition. The 5.4 Core release's own headline additions are PAwR and Encrypted Advertising Data.[16c]

For selection, verify the specific feature qualifications (BAP, PBP, LC3, and so on) for the exact part and firmware, rather than inferring them from the Core version.

How to Choose the Right Chip

  • For new true-wireless designs wanting LE Audio / Auracast, start at QCC307x / 308x / 309x (5.3 / 5.4) or the S1 / S7 platforms (6.0 / 6.2) — and confirm the specific LE Audio / Auracast qualifications, not just the Core version.
  • For cost-sensitive earbuds with solid aptX Adaptive, QCC304x (5.2) remains a strong, widely available choice.
  • For legacy product maintenance or aptX HD audio, CSR8670 / 8675 (4.2) are still supported through the ADK toolchain.
  • For USB host-side adapters, CSR8510 (4.0) is the classic, mature option.

A chip's Bluetooth specification version is tied to its radio hardware and original qualification. Firmware cannot add PHY or controller capabilities the silicon does not physically support. However, where the hardware already includes the necessary radio/controller features, a vendor can enable additional functionality — for example, some Auracast-related capabilities — through firmware, stack updates, and re-qualification; the Bluetooth SIG notes that the specification allows certain existing products to be upgraded in the field. Treat "version locked" as "locked by hardware," not as an absolute software prohibition.

Frequently Asked Questions

Is CSR still a separate company?

No. Qualcomm announced the acquisition in October 2014 and completed it on August 13, 2015; the business now operates as Qualcomm Technologies International, Ltd. (QTIL). "CSR" survives mainly as a product-name legacy on older parts.[4]

Does the CSR8670 support Bluetooth 5?

No. The CSR8670 is qualified to Bluetooth 4.2 per its product brief.[1] For Bluetooth 5 features you need a Qualcomm QCC-series part (or newer). Note the CSR8675 carries the same 4.2 brief figure, with some Qualcomm pages showing inconsistent fields — verify the exact qualified version against the brief and firmware you use.

What is the newest Bluetooth version in the CSR / Qualcomm audio lineup?

As of 2026 it is not 5.4. Qualcomm's S1 Gen 1 Sound Platform (QCC1228) is qualified to Bluetooth 6.0, and the newer Snapdragon S7 series documents a Bluetooth 6.2 radio.[10][17] The QCC308x / 309x (5.4) are simply the top of the older QCC30xx family.

If a chip is "qualified to Bluetooth 5.2," does it support LE Audio?

Not necessarily. Bluetooth 5.2 introduced the LE Isochronous Channels that enable LE Audio, but LE Audio itself (BAP/PBP/LC3 and related qualifications) is optional.[16a][16b] A 5.2-qualified part may or may not implement LE Audio — check the specific feature qualifications for that exact part and firmware.

Can a chip's Bluetooth version be upgraded through a firmware update?

Generally not at the Core level if the required radio/controller hardware is absent — firmware cannot invent PHY or controller capabilities the silicon lacks. But where the hardware already supports the necessary features, a vendor can add functionality (for instance, some Auracast capabilities) via firmware, stack updates, and re-qualification; the Bluetooth SIG states the specification permits some existing products to be field-upgraded.[16b][16c] So "version locked" means "locked by hardware," not an absolute software rule.

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References

  1. Qualcomm, "CSR8670 Bluetooth Audio Platform — Product Brief" (PDF). Lists Bluetooth v4.2 firmware.
  2. CSR Bluetooth Chip Selection Guide (third-party) — BlueCore BC03–BC06 generation mapping; notes BC6145 up to Bluetooth 3.0 and CSR8635 at 4.0. Distributor/third-party source; verify against Qualcomm briefs.
  3. Qualcomm, "CSR8675 Bluetooth Audio Platform — Product Brief" (PDF). Features section lists "Bluetooth version 4.2 compliant." Note: some Qualcomm web pages show inconsistent specification fields for this part.
  4. Qualcomm, "Qualcomm Completes $2.4 Billion Acquisition of CSR" — official press release (distributed via PR Newswire), Aug. 13, 2015. Acquisition completed; CSR renamed Qualcomm Technologies International, Ltd. (Announced Oct. 2014.)
  5. EE Times, "Under the Hood: CSR evolves along with Bluetooth" — BlueCore 2–6 Bluetooth version compliance (BC2/3: 1.1/1.2; BC4: 2.0+EDR; BC5: 2.1+EDR; BC6: 2.1+EDR eSCO).
  6. Business Weekly (Cambridge), founder account — BlueCore1 described as the world's first single-chip Bluetooth device, launched around 2000 (predating Bluetooth Core 1.1, adopted Feb. 2001).
  7. Bluetooth SIG, Specification Adopted Versions (official release dates and feature scope).
  8. DFRobot, Bluetooth CSR 4.0 Dongle (CSR8510) — Bluetooth 4.0 dual-mode specification (third-party; consistent with CSR8xx 4.0 dual-mode positioning).
  9. Qualcomm, "QCC30xx Series Bluetooth Audio SoCs — Product Brief" (PDF). QCC302x/303x=5.1, QCC304x=5.2, QCC305x/307x=5.3, QCC308x/309x=5.4; LE Audio on 307x/308x/309x.
  10. Qualcomm, "S1 Gen 1 Sound Platform (QCC1228)" product page — Bluetooth Specification Version: Bluetooth 6.0.
  11. Qualcomm, "QCC5100 Series Bluetooth Audio SoCs — Product Brief" (PDF). QCC512x qualified to 5.1; QCC514x to 5.2; QCC515x and QCC517x to 5.3; QCC5181 to 5.4; QCC517x / QCC518x designed to support LE Audio.
  12. Qualcomm, "CSR8645 — Bluetooth Audio Platform" Product Brief (PDF). "Bluetooth 4.0 specification compliant" / "Bluetooth v4.0 firmware."
  13. Qualcomm, CSR8615 product page — Bluetooth Specification Version: Bluetooth 4.1.
  14. Qualcomm, "QCC300x Family — Product Brief" (PDF). "Bluetooth 5.0 qualified" (QCC3001–QCC3008).
  15. Qualcomm, CSR1010 product page — Bluetooth Specification Version: Bluetooth 4.1 (CSR101x family, single-mode LE).
  16. Bluetooth SIG — LE Audio FAQs: LE Audio is built on the LE Isochronous Channels introduced in Bluetooth Core 5.2; it is a separate specification set (BAP / PBP / LC3), not part of any single Core release.
  17. Bluetooth SIG — "Communicating supported Bluetooth functionality": most Bluetooth capabilities are optional; the SIG advises members not to use the Core Specification version as the sole indicator of supported functionality, and to state specific qualified features instead.
  18. Bluetooth SIG — Auracast FAQ: Auracast broadcast audio is defined by the Public Broadcast Profile (PBP) within the LE Audio set; the specification allows some existing products to be upgraded in the field (subject to underlying hardware and supplier strategy).
  19. Qualcomm, "Snapdragon S7 and S7 Gen 1 Sound Platforms — Product Brief" (PDF). Bluetooth 6.2 radio; LE Audio / Auracast experiences.
  20. Qualcomm, CSR8635 product page — Bluetooth Specification Version: Bluetooth 4.1 (dual-mode audio ROM platform).
  21. Qualcomm, CSR8645 product page — current Specification field: Bluetooth 4.1 (older product brief lists "Bluetooth v4.0 firmware"; see ref12).
  22. Bluetooth SIG, "Bluetooth Core 6.1 is here" (published 6 May 2025) — introduces Randomized RPA (Resolvable Private Address) Updates.
  23. Bluetooth SIG, "Bluetooth Core 6.2 feature overview" — Shorter Connection Intervals, Channel Sounding amplitude-based attack resilience, HCI USB LE Isochronous Support, LE Test Mode enhancements.
  24. Bluetooth SIG, "Bluetooth Core 6.3 technical overview" (published 5 May 2026) — ranging precision (Channel Sounding inline PCT transfer, PHY-specific RTT accuracy), HCI capacity expansion (Running Out of Bits), RF requirement alignment (ACP / C/I limit relaxation).
  25. EDN, "CSR launches Bluetooth ROM device line" — BlueCore6 mono ROM headset family BC6130 / BC6140 / BC6150, fully compatible with Bluetooth v2.1 + EDR; introduces Proximity Pairing and CVC 5.0.
  26. EE Times, "Sixth generation Bluetooth brings fixed-line-quality voice" — BlueCore6 silicon supports v2.1 + EDR; debuts CSR AuriStream (ADPCM) voice codec for fixed-line-quality calls and lower power vs. CVSD.
  27. EDN / EE Times, "CSR trumpets tightest integrated wireless chip" — BlueCore7 (BC7), launched 2008, first single chip to combine Bluetooth v2.1 + EDR, Bluetooth low energy (ULP / Wibree, pre-4.0 branding), eGPS and FM transmit/receive; includes AuriStream voice codec.
  28. ESM China, "CSR launches 7th-gen BlueCore (BC7)" — details BlueCore7's v2.1 + EDR radio (+10 dBm Tx / –91 dBm Rx), AuriStream (–30% power), eGPS and FM; samples in 2008, volume in Q4.
  29. CSRA64215 teardown / module notes (Qualcomm CSRA64215) — single-chip ROM audio solution; compliant with Bluetooth v4.2; 80 MHz RISC MCU + 80 MIPS Kalimba DSP; TrueWireless Stereo (TWS), aptX / aptX-LL / AAC / SBC, 6th-gen cVc. Third-party module/manufacturer source; treat ROM-mask and exact qualified version per the specific ordering code.
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