Datasheet

 2016-2019 Microchip Technology Inc. DS50002519D-page 5
RN4678
Figure 1-2 illustrates the pin diagram of the RN4678 module.
FIGURE 1-2: RN4678 PIN DIAGRAM
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
TABLE 1-1: PIN DESCRIPTION (CONTINUED)
RN4678 Pin Name Type Description
GND 1
GND 2
GND 3
BAT_IN 4
SW_BTN 5
LDO33_O 6
VDD_IO 7
LDO18_O 8
WAKEUP 9
PMULDO_O 10
P0_4 11
P1_5 12
P1_2 13
P1_3 14
31 GND
30 LED
29 P3_7
28 P3_6
27 P3_4
26 P3_3
25 P3_2
24 P3_1
23 TXD
22 RXD
P1_7/CTS 15
P0_5 16
P0_0/RTS 17
P2_0 18 P2_4 19
EAN 20
RST_N 21
33 GND
32 GND