高通QCC3020：蓝牙5.0音频芯片技术详解

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"QCC3020是高通公司的一款高性能可编程蓝牙立体声音频系统级芯片（SoC），适用于蓝牙5.0技术，特别适用于True Wireless stereo耳塞产品。该芯片集成了多种功能，如低功耗三核处理器架构、高级音频算法和多种音频编解码器支持，确保了高质量的无线音频体验和长久的电池寿命。" QCC3020是高通CSR系列的一款重要产品，主要针对蓝牙音频设备市场，特别是True Wireless耳塞。这款芯片采用了蓝牙5.0标准，提供更远的传输距离和更高的数据传输速率，同时也保持了较低的功耗，从而延长了设备的电池寿命。在核心架构方面，QCC3020包含了120MHz的Qualcomm Kalimba音频数字信号处理器（DSP），负责处理复杂的音频处理任务。此外，它还包括一个32MHz的开发者处理器，用于运行应用程序，以及一个固件处理器，用于系统的日常运行。这种三核设计使得芯片能同时处理多个任务，提高了效率和响应速度。为了满足不同应用的需求，QCC3020提供了灵活的配置选项，如外部存储器通过QSPI接口进行编程，可以方便地更新固件。它还支持多种音频接口，包括24位高分辨率的音频接口，以及数字和模拟麦克风接口，确保音频输入的质量。此外，该芯片还内置了PWM支持的PIO控制器和LED引脚，便于设备的扩展功能设计。在音频编码解码方面，QCC3020支持aptX、aptX HD、aptX Low Latency等多种编解码器，提供了卓越的音质和低延迟体验。aptX技术尤其适用于对音质有高要求的无线音频设备，而aptX Low Latency则减少了音频传输中的延迟，对于观看视频或玩游戏时保持声音与画面同步至关重要。 QCC3020还集成了一系列实用的功能，如1或2个麦克风的Qualcomm cVc噪声消除和回声消除技术，提升通话质量。此外，它还配备了UART、Bit Serializer (I²C/SPI)、USB2.0等串行接口，方便与其他设备通信。集成的电源管理单元（PMU）包含双SMPS为系统和数字电路供电，以及集成的锂离子电池充电器，简化了整体设计。在物理尺寸方面，QCC3020封装为90-ball 5.5x5.5x1.0mm，适合小型化、便携式的音频设备应用。QCC3020是一款高度集成且功能强大的解决方案，旨在为无线音频设备提供优质的音频体验和高效的能效比。

Tables

Table 1-1: QCC3020 VFBGA pin allocaons (Orientaon from top of device)......................................................................... 18

Table 1-2: QCC3020 VFBGA device terminal funcons (Radio)................................................................................................19

Table 1-3: QCC3020 VFBGA device terminal funcons (Clock)................................................................................................ 19

Table 1-4: QCC3020 VFBGA device terminal funcons (USB).................................................................................................. 20

Table 1-5: QCC3020 VFBGA device terminal funcons (QSPI)................................................................................................. 20

Table 1-6: QCC3020 VFBGA device terminal funcons (PIO)................................................................................................... 21

Table 1-7: QCC3020 VFBGA device terminal funcons (Audio)............................................................................................... 23

Table 1-8: QCC3020 VFBGA device terminal funcons (AIO/LED drivers)................................................................................24

Table 1-9: QCC3020 VFBGA device terminal funcons (SMPS)................................................................................................24

Table 1-10: QCC3020 VFBGA device terminal funcons (Power supplies and control)........................................................... 24

Table 1-11: QCC3020 VFBGA device terminal funcons (Ground)...........................................................................................25

Table 1-12: QCC3020 VFBGA device terminal funcons (Not connected)............................................................................... 26

Table 8-1: High-quality ADC analog gain vs. input impedance and input amplitude............................................................... 40

Table 8-2: Headset output driver mode................................................................................................................................... 41

Table 8-3: I²S/PCM master mode ming diagram symbols...................................................................................................... 42

Table 8-4: I²S/PCM slave mode ming diagram symbols......................................................................................................... 43

Table 8-5: Codec input use condions..................................................................................................................................... 44

Table 8-6: Codec output use condion.................................................................................................................................... 44

Table 8-7: QCC3020 VFBGA audio slots....................................................................................................................................44

Table 9-1: Virtual PIO............................................................................................................................................................... 46

Table 9-2: LED controller paern............................................................................................................................................. 47

Table 9-3: LED_PWM to PIO to LED_PAD mapping.................................................................................................................. 48

Table 10-1: Transacon bridge PIO mulplex...........................................................................................................................49

Table 13-1: Parameters in Trickle charge..................................................................................................................................53

Table 13-2: Parameters in Pre-charge...................................................................................................................................... 54

Table 13-3: Parameters in Fast charge..................................................................................................................................... 54

Table 13-4: Parameters in Standby mode................................................................................................................................ 55

Table 16-1: Class-D DAC audio output..................................................................................................................................... 69

Table 16-2: High-quality (HQADC) single-ended audio input................................................................................................... 70

80-CG231-1 Rev. AA Confidential and Proprietary – Qualcomm Technologies International, Ltd.

MAY CONTAIN U.S. AND INTERNATIONAL EXPORT CONTROLLED INFORMATION

Figures

QCC3020 VFBGA funconal block diagram................................................................................................................................6

Figure 1-1: QCC3020 VFBGA package dimensions diagram..................................................................................................... 17

Figure 2-1: Bluetooth subsystem............................................................................................................................................. 28

Figure 3-1: Crystal oscillator..................................................................................................................................................... 30

Figure 4-1: QCC3020 VFBGA stac power states diagram....................................................................................................... 32

Figure 5-1: Host Interfaces subsystem..................................................................................................................................... 34

Figure 6-1: Applicaons subsystem..........................................................................................................................................35

Figure 7-1: QCC3020 VFBGA Audio subsystem........................................................................................................................ 37

Figure 8-1: QCC3020 VFBGA high-quality ADC input switch conguraon..............................................................................39

Figure 8-2: I²S/PCM master mode ming diagram.................................................................................................................. 42

Figure 8-3: I²S/PCM slave mode ming diagram......................................................................................................................43

Figure 11-1: Boot Manager...................................................................................................................................................... 50

Figure 12-1: System Manager.................................................................................................................................................. 51

Figure 13-1: PMU subsystem................................................................................................................................................... 52

Figure 13-2: Charge cycle states............................................................................................................................................... 53

Figure 13-3: Power regulaon..................................................................................................................................................56

Figure 14-1: QCC3020 VFBGA example applicaon schemac................................................................................................ 58

80-CG231-1 Rev. AA Confidential and Proprietary – Qualcomm Technologies International, Ltd.

MAY CONTAIN U.S. AND INTERNATIONAL EXPORT CONTROLLED INFORMATION

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