CM2025 | DigiCamel IC Datasheet

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CM2025 CMEDIA | Alldatasheet

Document overview

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PDF pages: 15

Technical content

DESCRIPTION

The CM2025 is a highly integrated single-chip Bluetooth audio solution targeting Bluetooth gaming headsets and wireless microphone markets with high performance and low power consumption. CM2025 adopts ARM Cortex-M4F core and a rich set of interfaces such as USB, SPI, UART, TWI, PWM, I2S TX/RX, capacitive touch key to accomplish various Bluetooth audio applications. CM2025 integrates BT v5.3 dual mode to BT classic and LE audio connection, which is fully backward compatible to v5.0/4.2/2.1 Bluetooth specifications. Both links in BR/EDR and LE can be active simultaneously for bidirectional HD voice transmission. CM2025 owns a power management unit (PMU) to establish a stable power source and linear battery charger with maximum 300mA charging current that allows CM2025 to recharge the battery over USB. Besides, with implementing Cmedia Xear™ Sound Technology- Surround HP and AI noise cancellation, to provide users the best auditory experience at near end, and transmit good voice quality to far end by filtering out the annoying sounds around, like keyboard typing, mouse clicking, fan sound, fan blades running, etc.

FEATURES

 ARM Cortex-M4F with Floating Point Unit (FPU) 96MHz  Internal 16M bits SPI serial Flash  Support Bluetooth v5.3 and backward compatible  Support BT dual-mode and link for BR/EDR and LE audio  Bluetooth transmitting output max. power: 13dBm  Bluetooth receiving sensitivity: -96dBm@GFSK, -94dBm@π/4 DQPSK, -88dBm@8DPSK modulation  Support SBC/AAC/LC3 BT audio transmission format  Support bidirectional voice transmission, sampling rate 32KHz/48KHz for up/down stream  Playback path latency is 25ms in LE audio mode  Support USB 2.0 Full Speed with UAC 1.0  Audio data supports up to 8~192K/24-bits sampling rate  Build in 24-bit DAC/ADC with 8K~96K sampling rate  Build in stereo ADC, SNR 102dB, THD+N<-90dB  Build in stereo DAC, SNR 120dB, THD+N<-100dB  Build in stereo 22mW PA for headphone  Fully configurable PEQ, up to 20 segments  Support I2S TX and RX, sampling rate up to 192KHz  Support Serial Interface: SPI, UART*2, TWI  Support 16 GPIO, 3 wake-up IO, 4 PWM for LED controller  Support Li-Ion battery and 5V power supply  Operating voltage: I/O 1.8~3.3V, Core 1.1V  Integrated battery charger up to 300mA with fast charge  Ultra-low-power: 3uA @ suspend; 10mA @active

1 Description and overview

The CM2025 is a highly integrated single-chip Bluetooth audio solution targeting Bluetooth gaming headsets and wireless microphone markets with high performance and low power consumption. CM2025 adopts ARM Cortex-M4F core and a rich set of interfaces such as USB, SPI, UART, TWI, PWM, I2S TX/RX, capacitive touch key to accomplish various Bluetooth audio applications. CM2025 integrates BT v5.3 dual mode to BT classic and LE audio connection, which is fully backward compatible to v5.0/4.2/2.1 Bluetooth specifications. Both links in BR/EDR and LE can be active simultaneously for bidirectional HD voice transmission. CM2025 owns a power management unit (PMU) to establish a stable power source and linear battery charger with maximum 300mA charging current that allows CM2025 to recharge the battery over USB. Besides, with implementing Cmedia Xear™ Sound Technology- Surround HP and AI noise cancellation, to provide users the best auditory experience at near end, and transmit good voice quality to far end by filtering out the annoying sounds around, like keyboard typing, mouse clicking, fan sound, fan blades running, etc.

2 Ordering information

Product Package Marking Package Type Transport Media Storage Temperature CM2025 CM2025 QFN-44 (4mm x 5mm) Tray -55 to 150 ℃

3 Features

3.1 System

3.1.1 ARM Cortex-M4F with Floating Point Unit (FPU) 96MHz

3.1.2 Internal 120KB RAM for data and program

3.1.3 Internal 224KB RAM

3.1.4 Internal ROM for firmware implementation

3.1.5 Internal 16Mbits QSPI serial Flash

3.1.6 Support USB and UART mass production and upgrade program

3.2 BT Compliance

3.2.2 Support BT5.3 dual-mode and dual-link for BR/EDR and LE audio

3.2.3 Max transmitting output power: 13dBm

3.2.4 Bluetooth receiving sensitivity: -96dBm@GFSK, -94dBm@π/4 DQPSK, -88dBm@8DPSK,

-98dBm@BLE mode 1Mbps, -95dBm@BLE mode 2Mbps

3.2.5 Support LE 1M/2M PHY

3.2.6 Support long range BLE

3.2.7 Support bidirectional voice transmission, sampling rate 32KHz/48KHz for up/down stream

3.2.8 The playback latency is about 25ms in LE audio mode

3.3 USB Compliance

3.3.1 USB 2.0 Full Speed 3.3.2 USB Audio Class 1.0

3.3.3 Audio data supports up to 24-bits data length and 8k~192k sampling rate

3.4 Audio Paths and Interface

3.4.1 Build in 2 channels 24-bit input sigma-delta ADC, SNR 102dB, THD+N<-90dB

3.4.2 ADC supports sample rate 8KHz to 96KHz

3.4.3 Support 2 channels analog/digital microphone

3.4.4 Build in stereo 24-bit input sigma-delta DAC, SNR 120dB, THD+N<-100dB, Noise<2uVrms

3.4.5 Build in stereo 22mW PA for headphone

3.4.6 DAC supports sample rate 8KHz to 96KHz

3.4.7 Support I2S TX/RX Master and Slave mode, sampling rate from 8KHz to 192KHz

3.5 Audio Processing

3.5.1 Fully configurable PEQ, up to 20 segments

3.5.2 Xear™ Surround Sound Technology Driver

3.6 Physical Interface

3.6.1 Support 16 GPIO, 3 wake-up IO

3.6.2 Support 4 PWM for lamp controller

3.6.3 Serial Interface: SPI, UART*2, TWI

3.6.4 Integrated 10bit SAR A/D converter

3.6.5 Support capacitive touch key

3.7 Power Management

3.7.2 Support Li-Ion battery and 5V power supply

3.7.3 Integrated linear battery charger up to 300mA with fast charge

3.7.4 Integrated 2*DC-DC buck converters

3.7.5 Low Power Consumption:

LE Audio: 10mA@Vbat = 3.8V - A2DP: 4.8mA@Vbat = 3.8V - HFP: 6.4mA@Vbat=3.8V - Fully charged mode: <4μA@Vbat = 3.8V - Shutdown mode: <3μA@Vbat = 3.8V

3.8 Others

3.8.1 Package QFN-44 (4mm*5mm, Pitch 0.35mm)

4 Applications

4.1 Wireless gaming headset/headphone

4.2 Wireless music and communication headset/headphone

4.3 Wireless microphone

Revision: 0.1

5 Block Diagram

Revision: 0.1

6 System Description

6.1 Pin-Out

6.2 Pin Description

2 TRX

22 GPIO2

USB_DM TA_GRANT UART0_RX UART1_RTS TWI_SDA SPI1_MOSI PWM3 DMIC_CLK I2STX_DOUT I2SRX_DIN

23 GPIO1

USB_DP BT_ACCESS UART0_TX UART1_CTS TWI_SCL SPI1_CLK PWM2 DMIC_DAT I2STX_LRCLK I2SRX_LRCLK

8 MICIN_1P

9 MICIN_1N

Copyright© C ultiplex IO Type PAD Drive Level Initial State BT/RF RF Bluetooth antenna IO USB Interface I2STX_DOUT DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA X USB Interface or General purpose I/O Power Domain: VCC I2STX_LRCLK I2SRX_LRCLK AIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA X USB Interface or General purpose I/O Power Domain: VCC Audio Interface AI Microphone or line input AI Microphone or line input CM2025 BT Audio Chip www.cmedia.com.tw Copyright© C-Media Electronics Inc. Power Domain: VCC USB Interface or General purpose I/O Power Domain: VCC Microphone or line input Microphone or line input

10 MICIN_0P AI Microphone or line input

11 MICIN_0N AI Microphone or line input

12 AOUTRP AO Right channel of AUDIO Analog output

13 AOUTRN AO Right channel of AUDIO Analog output

14 AOUTLN AO Left channel of AUDIO Analog output

15 AOUTLP AO Left channel of AUDIO Analog output

1 AVCC PWR

6 VMIC Microphone power

7 VREF_ADC Reference voltage of audio ADC

16 VC18 PWR 1.8V voltage

17 LX_VC18 PWR LX_VC18

18 VCC PWR 3.1V voltage

19 VBAT PWR Battery Voltage input

20 DC5V

UART1_TX UART1_RX UART0_TX UART0_RX PWR 5.0V Voltage

21 LX_VD12 PWR LX_VD12

24 VD12 PWR 1.2V voltage 25 VDD PWR 1.1V voltage

26 SVCC PWR

40 IOVCC PWR IO power supply: 1.8V or VCC Miscellaneous

3 GPIO4

BT_ACCESS UART1_TX TWI_SDA SPI1_CLK PWM0 DMIC_CLK I2STX_LRCLK I2SRX_LRCLK RC32KHz_OUT 32MHz_OUT VMIC1 DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA Z General purpose I/O Power Domain: IOVCC

4 GPIO9

ANT_SW0 UART0_TX UART1_TX TWI_SDA SPI1_SS PWM0 DMIC_DAT I2STX_DOUT I2SRX_DIN DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA Z General purpose I/O Power Domain: IOVCC

5 GPIO10

PTA_GRANT UART0_TX UART1_TX TWI_SCL SPI1_MOSI PWM1 DMIC_CLK I2STX_MCLK I2SRX_MCLK DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA Z General purpose I/O Power Domain: IOVCC

30 GPIO22

BT_ACCESS UART0_RX UART1_RX TWI_SDA PWM1 DMIC_DAT I2STX_DOUT I2SRX_DIN RC32KHz_OUT 32MHz_OUT DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA H General purpose I/O Power Domain: VCC

31 GPIO21

BT_REQ UART0_TX UART1_TX TWI_SCL PWM0 DMIC_CLK I2STX_DOUT I2SRX_DIN RC32KHz_OUT 32MHz_OUT DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA L General purpose I/O Power Domain: VCC

32 GPIO20

BT_REQ UART0_TX UART1_TX TWI_SCL SPI1_SS PWM2 DMIC_CLK I2STX_MCLK I2SRX_MCLK DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA Z General purpose I/O Power Domain: IOVCC

33 GPIO19

ANT_SW1 UART0_RX UART1_RTS TWI_SCL SPI1_MISO PWM3 DMIC_CLK I2STX_DOUT I2SRX_DIN DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA Z General purpose I/O Power Domain: IOVCC

34 GPIO18

BT_ACCESSE UART0_TX UART1_CTS TWI_SDA SPI1_MOSI PWM0 DMIC_DAT I2STX_BCLK I2SRX_BCLK DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA Z General purpose I/O Power Domain: IOVCC

35 GPIO17

BT_REQ UART0_RX UART1_RX TWI_SCL SPI1_CLK PWM2 DMIC_DAT I2STX_LRCLK I2SRX_LRCLK DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA Z General purpose I/O Power Domain: IOVCC

37 GPIO8

UART0_RX UART1_RX TWI_SDA SPI1_MISO PWM2 DMIC_CLK I2STX_LRCLK I2SRX_LRCLK DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA Z General purpose I/O Power Domain: IOVCC

38 GPIO7

BT_REQ UART0_TX UART1_TX TWI_SCL SPI1_MOSI PWM1 DMIC_DAT I2STX_MCLK I2SRX_MCLK DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA Z General purpose I/O Power Domain: IOVCC

39 GPIO6

PTA_GRANT UART0_RX UART1_RTS TWI_SDA SPI1_SS PWM3 DMIC_DAT I2STX_DOUT I2SRX_DIN DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA Z General purpose I/O Power Domain: IOVCC

41 GPIO5

ANT_SW2 UART0_TX UART1_CTS TWI_SCL SPI1_CLK PWM1 DMIC_CLK I2STX_BCLK I2SRX_BCLK DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA Z General purpose I/O Power Domain: IOVCC

42 GPIO0

UART0_TX UART1_TX TWI_SDA SPI1_SS PWM3 DMIC_CLK I2STX_BCLK I2SRX_BCLK RC32KHz_OUT 32MHz_OUT DIO L1: 2mA L2: 4mA L3: 6mA L4: 10mA Z General purpose I/O Power Domain: IOVCC

27 WIO0 GPIO

Power Domain: SVCC

28 WIO1 GPIO

Power Domain: SVCC

29 WIO2 GPIO

Power Domain: SVCC

43 HOSCO AO 32MHz clock output

44 HOSCI AI 32MHz clock input

36 I_CTK AI Capacitive touch key

45 EPAD GND Exposed pad as ground

7 Electrical Characteristics

7.1 Absolute Maximum Ratings

Parameter Symbol Min. Typ Max. Unit Supply Voltage DC5V -0.3 - 6.5 V BAT -0.3 - 5.0 V Input Voltage 3.3V IO -0.3 - 3.6 V 1.8V IO -0.3 - 1.98 V Operating ambient temperature T A -40 - +85 oC Storge temperature T S -55 - +150 oC ESD Protection(Human Body Model) HBM 3000 V Note: Even if one of the above parameters exceeds the absolute maximum ratings momentarily, the quality of the product may be degraded. The absolute maximum ratings, therefore, specify the value exceeding, which the product may be physically damaged. Use the product well within these ratings.

7.2 Recommended Operational Conditions

Supply Voltage Min. Typ Max. Units DC5V 4.3 5 6 V BAT (Li) 3.0 3.8 4.5 V VCC 2.8 3.1 3.4 V SVCC 2.6 2.8 3.0 V AVCC (AVCC_RTXRF_int) 2.6 2.8 3.0 V VC18 1.62 1.8 1.98 V VDD 0.81 1.1 1.21 V VD12 1.26 1.4 1.6 V IOVCC 1.62 1.8/3.1 3.4 V Operating ambient temperature - 25 - oC

7.3 DC Characteristics

7.4 Power Consumption

(TBC)

7.5 Battery Charge

Parameter Min. Typ Max. Units Input Voltage BAT+0.1 5 6 V Charge Current (CC Mode) 10 60 300 mA Trickle Charge Current 2 20 40 mA Trickle Charge Threshold Voltage - 3.0 - V Regulated Output (Float) Voltage 3.3 4.2 4.7 V Parameter Symbol Min. Max. Units Units Low-level input voltage VIL 0.6 V 3.1V GPIO pin IOVCC = 3.1V Tamb = -10 to 70 °C High-level input voltage VIH 2.4 V Low-level output voltage VOL 0.6 V High-level output voltage VOH 2.4 V Low-level input voltage VIL 0.3 V 1.8V GPIO pin IOVCC = 1.8V Tamb = -10 to 70 °C High-level input voltage VIH 1.5 V Low-level output voltage VOL 0.3 V High-level output voltage VOH 1.5 V

8 Package Information

Page 15 / 15 www.cmedia.com.tw Revision: 0.1 Copyright© C-Media Electronics Inc. －End of Datasheet－ C-MEDIA ELECTRONICS INC. TEL：+886-2-8773-1100 FAX：+886-2-8773-2211 E-MAIL：sales@cmedia.com.tw Disclaimer: Information provided by C-Media Electronics Inc. is sworn to be accurate and reliable. However, no responsibility is assumed by C-Media Electronics Inc. for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications are subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of C-Media. Trademarks, registered or not are the property of their respective owners.

Product Information

CM2025 specifications and overview.

Summary

BT Audio Chip Revision: 0.1 2023/11/17

Description

BT Audio Chip Revision: 0.1 2023/11/17

Source title CM2025 Datasheet(PDF) - C-Media Electronics

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