RN4871 datasheet(11/48 Pages) MICROCHIP

Part #	RN4871

Description	Bluetooth 4.2 Low Energy Module

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Manufacturer	MICROCHIP [Microchip Technology]

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 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

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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