Datasheet BM78 (Microchip) - 9

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BM78 2.0 APPLICATION INFORMATION 2.1 System Configuration
The system configuration I/O pins P2_0, P2_4 and EAN are used to set the configuration and firmware  programming modes. Each of these pins have internal pull-up and allow con- figuration settings and firmware update from the UART. Table 2-1 provides the system configuration settings.
TABLE 2-1: SYSTEM CONFIGURATION SETTINGS Module P2_0 P2_4 EAN Operational Mode
BM78SPPx5NC2 (ROM Variant) Low High High Test mode (Write EEPROM) High High High APP mode (Normal operation) BM78SPPx5MC2 (Flash Variant) Low Low High Write Flash Low High Low Test mode (Write EEPROM) High High Low APP mode (Normal operation)
2.2 Control and Indication I/O Pins
The I/O pins, P0_0, P0_5, P1_7, P3_1, P3_2, P3_3, P3_4, and P3_7 are configurable control and indication pins. The control signals are input to the BM78 module and the indication signals are output from the BM78 module. Table 2-2 provides default I/O pin configura- tion details.
TABLE 2-2: CONTROL AND INDICATION I/O PIN ASSIGNMENTS PIN Symbol Default Configuration
P0_0 UART_RTS
(1,2)
P0_5 N/C P1_7 UART_CTS
(1,2)
P3_1 INQUIRY CONTROL P3_2 LINK_DROP_CONTROL (DISCONNECT) P3_3 UART_RX_IND P3_4 PAIRING_KEY P3_7 LOW_BATTERY_IND
Note 1:
The RTS pin can only be assigned to P0_0 and the CTS pin can only be assigned to P1_7.
2:
The RTS and CTS pins can be configured as GPIOs, if flow control is disabled.  2016-2020 Microchip Technology Inc. DS60001380C-Page 9 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