Datasheet BM20, BM23 (Microchip) - 8

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BM20/23 Device Overview ...continued Pin Name Pin type Description No.
5 P1_5 I/O I/O pin, default pull-high input (Note 1) • NFC detection pin, active low • Out_Ind_0 • Slide Switch Detector, active low • Buzzer Signal Output 6 P0_4 I/O I/O pin, default pull-high input (Note 1) • NFC detection pin, active low • Out_Ind_0 7 SPKR O Right-channel, analog headphone output 8 AOHPM O Headphone common mode output/sense input 9 SPKL O Left-channel, analog headphone output 10 VDDA P Positive power supply/reference voltage for Codec, no need to add power to this pin 11 MIC1_P I MIC 1 mono differential analog positive input 12 MIC1_N I MIC 1 mono differential analog negative input 13 MIC_BIAS P Electric microphone biasing voltage 14 AIR I Right-channel, single-ended analog input 15 AIL I Left-channel, single-ended analog input 16 RST I System Reset pin, Low: reset 17 VCC_RF P 1.28V RF LDO output, no need to add power to this pin 18 P0_1 I/O I/O pin, default pull-high input (Note 1) • FWD key, when Class 2 RF (default), active-low • Class 1 Tx Control signal of external RF T/R switch, active-high 19 VDD_IO P Power output, no need to add power to this pin 20 ADAP_IN P 5V Power adapter input 21 BAT_IN P 3.0V to 4.2V Li-Ion battery input 22 NC - No connection 23 GND P Ground pin 24 SYS_PWR P System power output BAT mode: 3.0 to 4.2V Adapter mode: 4.0V 25 BK_OUT P 1.8V Buck output, no need to add power to this pin 26 MFB I • Power key in off mode • UART_RX_IND: MCU used to wake-up Bluetooth (Note 1) 27 LED1 I LED driver 1 28 LED2 I LED driver 2 © 2019 Microchip Technology Inc.
Datasheet
DS70005406B-page 8 Document Outline Introduction Features RF/Analog Audio processor Audio Codec Peripherals Antenna Compliance Operating Conditions Applications Table of Contents 1. Device Overview 1.1. Interface Description 2. Application Information 2.1. Operation with External MCU 2.2. I2S Mode Application 2.3. RESET (RST_N) 2.4. Status LED (LED1, LED2) 2.5. External Configuration 3. Electrical Characteristics 4. Printed Antenna Information 4.1. Module Radiation Pattern 4.2. Module Placement Rules 5. Reference Circuit 5.1. BM20 Reference Circuit 5.2. BM23 Reference circuit 6. Physical Dimensions 7. Reflow Profile 7.1. Soldering Recommendations 7.2. Packing and Storage Information 8. Ordering Information 9. Certification Notices 9.1. United States 9.1.1. Labeling and User Information Requirements 9.1.2. RF Exposure 9.1.3. Helpful Websites 9.2. Canada 9.2.1. Labeling and User Information Requirements 9.2.2. RF Exposure 9.2.3. Helpful Websites 9.3. Europe 9.3.1. Labeling and User Information Requirements 9.3.2. Conformity Assessment 9.3.3. Simplified EU Declaration of Conformity 9.3.4. Helpful Websites 9.4. Japan 9.4.1. Labeling and User Information Requirements 9.4.2. Helpful Websites 9.5. Korea 9.5.1. Labeling and User Information Requirements 9.5.2. Helpful Websites 9.6. Taiwan 9.6.1. Labeling and User information Requirements 9.6.2. Helpful Websites 9.7. China 9.7.1. Labeling and User Information Requirements 9.8. Brazil 9.9. Mexico 9.9.1. Labeling and User Information Requirements 9.10. Argentina 9.10.1. Labeling and User Information Requirements 9.11. Other Regulatory Jurisdictions 10. Document Revision History The Microchip Website Product Change Notification Service Customer Support Microchip Devices Code Protection Feature Legal Notice Trademarks Quality Management System Worldwide Sales and Service