Datasheet RN4678 (Microchip) - 4

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RN4678
Table 1-1 provides the description of the various pins of the RN4678 module.
TABLE 1-1: PIN DESCRIPTION RN4678 Pin Name Type Description
1 GND Power Ground reference 2 GND Power Ground reference 3 GND Power Ground reference 4 BAT_IN Power Battery Input (3.3V to 4.2V) Main positive supply input Connect to 10 µF (X5R/X7R) capacitor 5 SW_BTN DI • Software Button - H : Powe r On - L : Powe r Off • By default, this functionality is disabled. Refer to RN4678 Com- mand Reference User Guide (DS50002506) to enable the feature 6 LDO33_O Power Internal 3.3V LDO output; can source no more than 50 mA 7 VDD_IO Power I/O positive supply input. For internal use only; do not connect to other devices. 8 LDO18_O Power Internal 1.8V LDO output. For internal use only; do not connect to other devices. 9 WAKEUP DI Wake-up from Sleep mode (active-low) (internal pull-up) 10 PMULDO_O Power Power management unit output. For internal use only; do not connect to other devices. 11 P0_4 DO Status Indication pin. Indicates the current status of BLE data transmission. High: Data currently transmitting Low: No current data transmission 12 P1_5 DO Status Indication pin. Indicates the current connection status. High: Powered On and not connected Low: Connected to peer device 13 P1_2 DO GPIO pin. Internally pulled-up by default. 14 P1_3 DIO GPIO pin. Internally pulled-up by default. 15 P1_7/CTS DIO Configurable Control or Indication pin or UART CTS (input) 16 P0_5 DIO Configurable Control or Indication pin 17 P0_0/RTS DIO Configurable Control or Indication pin or UART RTS (output) 18 P2_0 DI System configuration pin. Along with P2_4 and EAN pins, used to set the module in any of the following three modes: Application mode (for normal operation), Test mode (to change EEPROM values), and Write Flash mode (to enter the new firmware into the module); refer to Table 2-1. 19 P2_4 DI System configuration pin. Along with P2_0 and EAN pins, used to set the module in any of the following three modes: Application mode (for normal operation), Test mode (to change EEPROM values), and Write Flash mode (to enter new firmware into the module); refer to Table 2-1. 20 EAN DI External address-bus negative pin. System configuration pin along with P2_0 and P2_4 pins, used to set the module in any of the following three modes: Application mode (for normal operation), Test mode (to change EEPROM values), and Write Flash mode (to enter new firmware into the module); refer to Table 2-1. Must be pulled down with 4.7 k to GND. 21 RST_N DI Module Reset (internal pull-up). Apply a pulse of at least 63 ns. 22 RXD DI UART data input  2016-2020 Microchip Technology Inc. DS50002519E-page 4 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