Datasheet BM78 (Microchip) - 4

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BM78 1.0 SYSTEM OVERVIEW
The BM78SPPS5MC2/NC2 is a complete and fully reg- ulatory certified module with an integral ceramic chip The BM78 module is a fully-certified, embedded  antenna and RF shield. The BM78SPP05MC2/NC2 is 2.4 GHz Bluetooth (BR/EDR/LE) wireless module. It a low-cost alternative with RF-out pin (for external includes an on-board Bluetooth stack, power manage- antenna) and no RF shield. The integrator is responsi- ment subsystem, 2.4 GHz transceiver, and RF power ble for the antenna, antenna matching, and regulatory amplifier. Customers can embed Bluetooth functionality certifications. into any application using the BM78 module. The BM78 module is a small, compact, and sur- The BM78 module enables rapid product development face-mounted module with castellated pads for easy and faster time to market, and it is designed to provide and reliable host PCB mounting. It is compatible with integrators with the following features: standard pick-and-place equipment and can inde- • Simple integration and programming pendently maintain a low-power wireless connection. • Reduced development time Low-power usage and flexible power management max- imize the lifetime of the BM78 module in battery oper- • Superior wireless module with low-cost system ated devices. A wide operating temperature range • Interoperability with Bluetooth host enable its applications in indoor and outdoor environ- • Wide range of applications ments. Figure 1-1 illustrates the internal block diagram of the BM78 module.
FIGURE 1-1: INTERNAL BLOCK DIAGRAM OF BM78 MODULE BM78 Bluetooth® Dual Mode Module
(Only BM78SPPS5MC2/NC2) PMU Antenna BAT_ IN BAT_ DET Matching SW_ BTN SW_ BTN LDO33_O Bluetooth LDO3V3_OUT Baseband LDO18_O
IS1678 S/SM
16 MHz and RF LDO1V8_OUT Crystal VDD_IO VDDIO MCU RST_N RST_N Core 320 KB ROM WAKE_UP WAKE_UP 28 KB SRAM GPIO LED Driver LED1 4 Mbit Flash TXD (IS1678SM Only) HOST MCU RXD SCL UART I2C RTS SDA CTS EEPROM  2016-2020 Microchip Technology Inc. DS60001380C-Page 4 Document Outline BM78 Features RF/Analog Data Throughput FIGURE 1: BM78 MODULE MAC/Baseband/Higher Layer Operating Conditions Applications General Description Table of Contents Most Current Data Sheet Errata Customer Notification System 1.0 System Overview FIGURE 1-1: Internal Block Diagram of BM78 module TABLE 1-1: Pin Description FIGURE 1-2: BM78SPPS5MC2/NC2 Pin Diagram FIGURE 1-3: BM78SPP05MC2/NC2 Pin Diagram 2.0 Application Information 2.1 System Configuration TABLE 2-1: System Configuration Settings 2.2 Control and Indication I/O Pins TABLE 2-2: CONTROL AND INDICATION I/O PIN ASSIGNMENTS TABLE 2-3: CONFIGURABLE FUNCTIONS AND DESCRIPTIONS 2.3 Status Indication I/O Pins TABLE 2-4: Status Indication 2.4 Power Tree FIGURE 2-1: Power Tree Diagram 2.5 Software Power Button (SW_BTN) FIGURE 2-2: SW_BTN TIMING (HIGH) at Application MODE FIGURE 2-3: SW_BTN TIMING at Access States FIGURE 2-4: SW_BTN TIMING (Low) at Link States 2.6 WAKE-UP FIGURE 2-5: Wake-up Time 2.7 External Reset FIGURE 2-6: Timing waveforms on Reset 2.8 LED Driver FIGURE 2-7: LED Driver 2.9 Host MCU Interface over UART FIGURE 2-8: Power and MCU Interface Example for BM78 module 2.10 Reference Circuit FIGURE 2-9: BM78SPP05MC2/NC2 Reference Circuit FIGURE 2-10: BM78SPP05MC2/NC2 Reference Circuit FIGURE 2-11: BM78SPPS5MC2/NC2 Reference Circuit FIGURE 2-12: BM78SPPS5MC2/NC2 Reference Circuit 3.0 Operating Modes FIGURE 3-1: Operating Mode Configuration 3.1 Auto Pattern Mode FIGURE 3-2: Auto Pattern Mode 3.2 Manual Pattern FIGURE 3-3: State Changes by MCU in Manual Pattern 4.0 Electrical Characteristics Absolute Maximum Ratings TABLE 4-1: Recommended Operating Conditions TABLE 4-2: 3.3V LDO Electrical Parameters TABLE 4-3: PMU LDO TABLE 4-4: SAR-ADC AND Battery Voltage Detector TABLE 4-5: Intensity Controllable LED Driver TABLE 4-6: Power Consumption-Classic TABLE 4-7: Power Consumption-Low Energy 5.0 Radio Characteristics TABLE 5-1: Transmitter Performance TABLE 5-2: Receiver Performance 6.0 Physical Dimensions FIGURE 6-1: BM78SPPS5MC2/NC2 Module Dimensions FIGURE 6-2: BM78SPPS5MC2/NC2 Recommended PCB Footprint FIGURE 6-3: BM78SPPS5MC2/NC2 Host PCB Mounting Suggestion FIGURE 6-4: BM78SPP05MC2/NC2 Module Dimensions FIGURE 6-5: BM78SPP05MC2/NC2 Recommended PCB Footprint FIGURE 6-6: BM78SPP05MC2/NC2 Host PCB Mounting Suggestion 7.0 Reflow Profile Module FIGURE 7-1: Reflow Profile 8.0 Module Placement Guidelines FIGURE 8-1: Module Placement Examples TABLE 8-1: Recommended Antenna FIGURE 8-2: Keep Out Area Recommended for Antenna 8.1 BM78SPPS5MC2/NC2 Ceramic Chip Antenna FIGURE 8-3: BM78SPPS5MC2/NC2 Antenna Radiation Pattern TABLE 8-2: Antenna Radiation Pattern Details 9.0 Ordering Information TABLE 9-1: BM78 Module SKUs Appendix A: Certification Notices TABLE A-1: EUROPEAN COMPLIANCE TESTING Appendix B: Revision History The Microchip WebSite Trademarks Worldwide Sales