Datasheet RN4678 (Microchip) - 5

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RN4678 TABLE 1-1: PIN DESCRIPTION (CONTINUED) RN4678 Pin Name Type Description
23 TXD DO UART data output 24 P3_1 DIO Configurable Control or Indication pin (Internally pulled-up, if configured as an input) 25 P3_2 DIO Configurable Control or Indication pin (Internally pulled-up, if configured as an input) 26 P3_3 DIO Configurable Control or Indication pin (Internally pulled-up, if configured as an input) 27 P3_4 DIO Configurable Control or Indication pin (Internally pulled-up, if configured as an input) 28 P3_6 DIO Do not connect. 29 P3_7 DIO Configurable Control or Indication pin (Internally pulled-up, if configured as an input) 30 LED DO Status LED, connect to LDO33_0 31 GND Power Ground reference — BT_RF AIO External antenna connection (50 ohms) 32 GND Power Ground reference 33 GND Power Ground reference
Legend:
A = Analog D = Digital I = Input O = Output Figure 1-2 illustrates the pin diagram of the RN4678 module.
FIGURE 1-2: RN4678 PIN DIAGRAM
GND 1 33 GND GND 2 32 GND GND 3 BAT_IN 4 SW_BTN 5 31 GND LDO33_O 6 30 LED VDD_IO 7 29 P3_7 LDO18_O 8 28 P3_6 WAKEUP 9 27 P3_4 PMULDO_O 10 26 P3_3 P0_4 11 25 P3_2 P1_5 12 24 P3_1 P1_2 13 23 TXD P1_3 14 22 RXD 5 6 7 8 9 0 1 1 1 1 1 1 2 S 5 S 0 4 N 2 T _ T _ _ _ C P0 R P2 P2 EAN T RS P1_7/ P0_0/  2016-2020 Microchip Technology Inc. DS50002519E-page 5 Document Outline RN4678 Features RF/Analog Data Throughput Operating Conditions MAC/Baseband/Higher Layer Features Applications Description Table of Contents Most Current Data Sheet Errata Customer Notification System 1.0 Device Overview FIGURE 1-1: RN4678 Internal Block Diagram TABLE 1-1: PIN Description FIGURE 1-2: RN4678 PIN DIAGRAM 2.0 Application Information 2.1 Module Configuration 2.2 Flow Control 2.3 Control and Indication I/O Pins 2.4 Power Tree FIGURE 2-1: Power Tree Diagram 2.5 Software Button (SW_BTN) FIGURE 2-2: SW_BTN TIME (HIGH) AT APP MODE(1,2) FIGURE 2-3: SW_BTN TIME (LOW) AT ACCESS STATES(1) FIGURE 2-4: SW_BTN TIME (LOW) AT LINK STATES(1,2) 2.6 WAKE-UP FIGURE 2-5: WAKE-UP TIME(1) 2.7 External Reset FIGURE 2-6: TIMING WAVEFORMS ON RESET (1,2) 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 Rn4678 2.10 Reference Circuit FIGURE 2-9: RN4678 Reference Circuit 3.0 Electrical Characteristics Absolute Maximum Ratings TABLE 3-1: Recommended Operating Conditions TABLE 3-2: 3.3V LDO Electrical Parameters (1,2) TABLE 3-3: PMU LDO(1,2) TABLE 3-4: SAR-ADC AND Battery Voltage Detector TABLE 3-5: Intensity Controllable LED Driver TABLE 3-6: Power Consumption-Classic(1) TABLE 3-7: Power Consumption-Low Energy(1,2) 4.0 Radio Characteristics TABLE 4-1: Transmitter Performance (1,2) TABLE 4-2: Receiver Performance(1) 5.0 Physical Dimensions FIGURE 5-1: RN4678 Module Dimensions FIGURE 5-2: RN4678 Recommended PCB Footprint FIGURE 5-3: RN4678 Host PCB Mounting Suggestion 6.0 Reflow profile FIGURE 6-1: Reflow Profile 7.0 Module Placement FIGURE 7-1: Module Placement Examples TABLE 7-1: Recommended Antenna FIGURE 7-2: Keep Out Area Recommended for Antenna 7.1 RN4678 Ceramic Chip Antenna FIGURE 7-3: RN4678 Antenna Radiation Pattern 8.0 Ordering Information TABLE 8-1: Ordering Information 9.0 Regulatory Approval 9.1 United States 9.2 Canada 9.3 Europe TABLE 9-1: EUROPEAN COMPLIANCE TESTING 9.4 Japan 9.5 Korea 9.6 Taiwan 9.7 China 9.8 Other Regulatory Information Appendix A: Revision History The Microchip WebSite Product Identification System Trademarks Worldwide Sales