Datasheet BM90 (Microchip) - 8

BM90 Module
14 AI AIR Stereo analog aux in, R-channel 15 AI AIL Stereo analog aux in, L-channel 16 I/O RST_N System Reset Pin IO, default pull-high input. 17 I/O P3_4 SLIDE SWITCH IO, default pull-high input. 18 I/O P3_7 FWD button VDD_IO pin, for calibration only 19 P VDD_IO Do not add external power to this pin 20 P ADAP_IN Power adaptor DC 5V input Li-Ion Battery input, should be always connected even if the power is 21 P BAT_IN given on power Adaptor input. 22 I/O SK1 Line-in detection 23 P GND Ground 24 P SYS_PWR System Power Output 25 P BK_OUT Buck feedback sense pin 26 P MFB Multi-Function Push Button key 27 P LED1 LED Driver 1 28 P LED2 LED Driver 2 IO, default pull-high input. 29 I/O P2_4 System Configuration, H: Boot Mode Low: N_SPK Role Master/Slave IO, default pull-high input. 30 I/O P0_2 PLAY/PAUSE button IO, default pull-high input when system power on. 31 I/O P0_5 After system power on, the IO function is by FW programming. REV button 32 O HCI_TXD HCI TX data 33 I HXI_RXD HCI RX data IO, default pull-high input. 34 I/O P1_6 Volume down button IO, default pull-high input. 35 I/O P0_1 Volume up button 36 I/O P0_3 IO for 3rd LED optional. 37 P GND Ground. 38 NC NC . 39 NC NC . 40 NC NC . * I: signal input pin *AI: analog signal input pin * O: signal output pin *AO: analog signal output pin * I/O: signal input/output pin * P: power pin *AP: analog power pin

page 8 Document Outline Bluetooth® 3.0 Multi-Speaker Stereo Audio Module Features Description Applications Table of Contents 1.0 DEVICE OVERVIEW FIGURE 1-1: APPLICATION BLOCK DIAGRAM Audio Interface FIGURE 1-2: Analog audio interface block diagram FIGURE 1-3: Twin Speaker Link block diagram 2.0 Key Features Table 3.0 PIN DESCRIPTION TABLE 3-1: BM90 PIN DESCRIPTION 4.0 SPECIFICATIONS 4.1 SPECIFICATIONS Table 4-1: Absolute Maximum Specifications Table 4-2: Recommended operating condition Table 4-3: Battery Charger Table 4-4: LED driver Table 4-5: Digital IO Table 4-6: Audio codec Digital to Analogue Converter Table 4-7: Audio codec Analogue to Digital Converter Table 4-8: Transmitter section for BDR Table 4-9: Transmitter section for EDR Table 4-10: Receiver section for BDR Table 4-11: Receiver section for EDR 4.2 PRINTED ANTENNA PERFORMANCE Table 4-12: Antenna Parameters FIGURE 4-1: Antenna 3D radiation pattern @2441 MHz 4.3 BQTF INFORMATION FIGURE 4-2: BQTF Information 4.4 CURRENT CONSUMPTION Table 4-13: Single Mode current consumption Table 4-14: Twin Mode: Master current consumption Table 4-15: Twin Mode: Slave current consumption 5.0 APPLICATIONS 5.1 EXTERNAL CONFIGURATION FIGURE 5-1: External Configuration Header Connections TABLE 5-1: SYSTEM CONFIGURATION SETTINGS 5.2 LED DRIVER 5.3 FUNCTION OF PIN TABLE 5-2: IOs for Buttons TABLE 5-3: IOs for added functions 5.4 Adaptive Frequency Hopping (AFH) 5.5 MULTI-SPEAKER 5.5.1 TWIN SPEAKER LINK TECHNOLOGY INTRODUCTION 5.5.1.1 TWIN SPEAKER LINK Figure 5-2 A2DP Twin Speaker Link Diagram 5.6 Mounting Details 5.7 Module Dimension FIGURE 5-3: BM90 module FIGURE 5-4: Outline Dimension FIGURE 5-5: Module Foot print 5.8 Main Board Antenna Area Layout Guide FIGURE 5-6: Mother Board Antenna Area Layout Guide 5.9 RFLOW PROFILE 5.9.1Soldering Recommendations FIGURE 5-7: Reflow profile 6.0 REFERENCE CIRCUIT FIGURE 6-1: BM90 reference circuit 7.0 PACKING INFORMATION 7.1 QR code label information 7.2 Storage standard 7.3 Ordering Information 7.4 Tray Dimensions 7.5 Packing Method