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RN4870 Datasheet(PDF) 11 Page - Microchip Technology |
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RN4870 Datasheet(HTML) 11 Page - Microchip Technology |
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11 / 48 page  2016 Microchip Technology Inc. DS50002489A-page 11 RN4870/71 3.0 INTERFACE PINS Figure 3-1 shows the power scheme using a 3.3V low-dropout regulator to the RN487x and a host MCU. This scheme ensures that the same voltage is used for both the module and the MCU. Figure 3-1 also shows the basic UART connections to the host MCU. Figure 3-2 shows the recommended connections for running the RN4870/71 on coin cell battery. FIGURE 3-1: POWER SCHEME System Configurator System Configurator Note 1: Ensure VDD_IO and MCU VDD voltages are compatible 2: Control and Indication ports are configurable 3: To implement low-power operation, enable the UART_RX_IND pin and connect to ground. Note 1: Ensure VDD_IO and MCU VDD voltages are compatible 2: Control and Indication ports are configurable 3: 10 µF (X5R) and 330 ohm resistor are required for RN487x 4: BK_IN connects to VBAT for RN4871U 5: To implement low-power operation, enable the UART_RX_IND pin and connect to ground. RN4870/71/70U RN4871U |
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