Datasheet RN4870, RN4871 (Microchip) - 4

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RN4870/71 TABLE 1-2: PIN DESCRIPTION (CONTINUED) RN4870U RN4870 RN4871U RN4871 Name Type Description
— — 13 6 P1_6 D Configurable pin. Refer to
Section 1.2 “Module Configuration”
for details. When connected to host MCU, set the pin connected to pin P1_6 in either high impedance or drive pin low during firmware start-up (approximately 22 msec). — — 14 5 P1_7 D Configurable pin. Refer to
Section 1.2 “Module Configuration”
for details. 9 11 15 15 P2_7 D O/p UART_TX_IND output pin. Provides indication if RN4870 is transmitting to host MCU over UART. Pulled low before UART TX begins and pulled high after UART TX is over. 10 12 — — P1_1 D I/O GPIO; default: Input; pulled-high A I/p AD9 Configured as the BLEDK_STATUS1_IND pin by default 11 13 2 3 P1_2 D I/O GPIO; default: Input; pulled-high A I/p AD10; I2C SCL pin 12 14 3 4 P1_3 D I/O GPIO; default: Input; pulled-high AD11; I2C SDA pin 13 15 8 11 P0_0 D I/O GPIO; default: Input; pulled-high AD0 Configured as the UART_CTS pin by default 14 16 — — P1_0 D I/O GPIO; default: Input; pulled-high AD8 Configured as the BLEDK_STATUS2_IND pin by default 15 17 6 9 P3_6 D I/O GPIO; default: Input; pulled-high (only for RN4870) Configured as the UART_RTS pin by default 16 18 16 16 P2_0 D I/p System configuration input; 1: Application mode 0: Test mode/Flash update/EEPROM configuration Default: Input; pulled-high 17 19 — — P2_4 D I/O GPIO; default: Input; pulled-high 18 20 — — NC — No Connection 19 21 7 10 RST_N D I/p Module Reset; active-low; Internally pulled-high 20 22 5 7 UART_RX D I/p UART Data input 21 23 4 8 UART_TX D O/p UART Data output 22 24 — — P3_1 D I/O GPIO; default: Input; pulled-high Configured as RSSI_IND pin by default; SPI NCS Bus 23 25 — — P3_2 D I/p GPIO; default: Input; pulled-high Configured as the LINK_DROP pin by default; SPI MISO pin 24 26 — — P3_3 D I/p GPIO; default: Input; pulled-high Configured as the UART RX Indication pin by default; SPI MOSI pin 25 27 — — P3_4 D I/p GPIO; default: Input; pulled-high Configured as the PAIRING_KEY pin by default; SPI SCLK pin DS50002489D-page 4  2016-2019 Microchip Technology Inc. Document Outline Bluetooth® Low Energy Module 1.0 Device Overview 1.1 Overview TABLE 1-1: RN4870/71 Family TABLE 1-2: PIN Description FIGURE 1-1: PIN Diagram - RN4870U FIGURE 1-2: PIN Diagram - RN4870 FIGURE 1-3: PIN Diagram - RN4871U FIGURE 1-4: PIN Diagram - RN4871 1.2 Module Configuration TABLE 1-3: Configurable pins and default functions in the RN4870 and RN4871 TABLE 1-4: Configurable functions and descriptions TABLE 1-5: Status Indication PINs TABLE 1-6: Test points on the bottom side FIGURE 1-5: Block Diagram of the RN4870/71 2.0 Specifications TABLE 2-1: General Specifications TABLE 2-2: Electrical characteristics TABLE 2-3: Current consumption TABLE 2-4: Current consumption during application mode 3.0 Interface PINs FIGURE 3-1: Power Scheme FIGURE 3-2: RN4870/71 Coin cell power scheme 4.0 Physical Dimensions And Attributes 4.1 RN4870 Module FIGURE 4-1: RN4870 module dimensions FIGURE 4-2: RN4870 Recommended PCB footprint FIGURE 4-3: Recommended mounting details 4.2 RN4870U Module FIGURE 4-4: RN4870U module dimensions FIGURE 4-5: RN4870U recommended PCB footprint FIGURE 4-6: RN4870U Recommended PCB mounting 4.3 RN4871 Module FIGURE 4-7: RN4871 module dimensions FIGURE 4-8: RN4871 recommended PCB footprint FIGURE 4-9: RN4871 Recommended PCB mounting suggestion 4.4 RN4871U Module FIGURE 4-10: RN4871U module dimensions FIGURE 4-11: RN4871U recommended PCB footprint FIGURE 4-12: RN4871U Recommended PCB mounting FIGURE 4-13: Recommendations for the placement of the module on the Host PCB board 4.5 Soldering Recommendations 5.0 Application Reference Circuits 5.1 External Configuration and Programming 5.2 Reference Circuit FIGURE 5-1: External programming header configurations FIGURE 5-2: RN4870 reference circuit FIGURE 5-3: RN4870U reference circuit FIGURE 5-4: RN4871 Reference circuit FIGURE 5-5: RN4871U reference circuit 5.3 Power Drop Protection FIGURE 5-6: Power Drop protection circuit 6.0 ASCII Command API 7.0 Supported Services 8.0 Antenna Characteristics FIGURE 8-1: RN4870 Antenna performance FIGURE 8-2: RN4871 Antenna performance 9.0 Timing Characteristics FIGURE 9-1: Timing diagram of RN4870/71 UART ready after reset (in test and application mode) FIGURE 9-2: Timing diagram of RN4870/71 UART when powered on (in test and application mode) TABLE 9-1: Error rate for various baud rates on the RN4870/71 10.0 Regulatory Approval 10.1 United States 10.1.1 Labeling and User Information Requirements 10.1.2 RF Exposure 10.1.3 HELPFUL WEB SITES 10.2 Canada 10.2.1 Labeling and User Information Requirements 10.2.2 RF Exposure 10.2.3 Helpful Web Sites 10.3 Europe 10.3.1 LABELING AND USER INFORMATION REQUIREMENTS 10.3.2 CONFORMITY ASSESSMENT 10.3.3 Helpful web sites 10.4 Japan 10.4.1 LABELING AND USER INFORMATION REQUIREMENTS 10.4.2 HELPFUL WEB SITES 10.5 Korea 10.5.1 LABELING AND USER INFORMATION REQUIREMENTS 10.5.2 HELPFUL WEB SITES 10.6 Taiwan 10.6.1 LABELING AND USER INFORMATION REQUIREMENTS 10.6.2 HELPFUL WEB SITES 10.7 China 10.7.1 LABELING AND USER INFORMATION REQUIREMENTS 10.8 Other Regulatory Jurisdictions 10.9 Other Regulatory Information 11.0 Ordering Information TABLE 11-1: Ordering information Appendix A: Revision History The Microchip WebSite Customer Change Notification Service Customer Support AMERICAS Corporate Office Atlanta Austin, TX Boston Chicago Dallas Detroit Houston, TX Indianapolis Los Angeles Raleigh, NC New York, NY San Jose, CA Canada - Toronto ASIA/PACIFIC Australia - Sydney China - Beijing China - Chengdu China - Chongqing China - Dongguan China - Guangzhou China - Hangzhou China - Hong Kong SAR China - Nanjing China - Qingdao China - Shanghai China - Shenyang China - Shenzhen China - Suzhou China - Wuhan China - Xian China - Xiamen China - Zhuhai ASIA/PACIFIC India - Bangalore India - New Delhi India - Pune Japan - Osaka Japan - Tokyo Korea - Daegu Korea - Seoul Malaysia - Kuala Lumpur Malaysia - Penang Philippines - Manila Singapore Taiwan - Hsin Chu Taiwan - Kaohsiung Taiwan - Taipei Thailand - Bangkok Vietnam - Ho Chi Minh EUROPE Austria - Wels Denmark - Copenhagen Finland - Espoo France - Paris Germany - Garching Germany - Haan Germany - Heilbronn Germany - Karlsruhe Germany - Munich Germany - Rosenheim Israel - Ra’anana Italy - Milan Italy - Padova Netherlands - Drunen Norway - Trondheim Poland - Warsaw Romania - Bucharest Spain - Madrid Sweden - Gothenberg Sweden - Stockholm UK - Wokingham Worldwide Sales and Service Trademarks Worldwide Sales and Service