RN4870 Datasheet, PDF (25/48 Pages) Microchip Technology – Bluetooth 4.2 Low Energy Module

FIGURE 5-3:
RN4870U REFERENCE CIRCUIT
Reverse Voltage Protection
Power Input
J1
Q1
STS2301
VCC
1
2
C1
GND
P2_2
GND
GND GND
10uF 6.3V X5R
Configuration Interface
P2_0
J2
1 VCC
2
3 UART_RX
4 UART_TX
5
GND
P2_0
Low
High
P2_3
P2_7
P1_1
P1_2
P1_3
MODE
Test Mode
APP Mode
1 _GND
2 _VBAT
3 _{P2_2}
4 _{VDD_IO}
U1
5 _{VDD_IO}
RN4870U
6 _{ULPC_O}
7 _{P2_3}
8 _{BK_O}
9 _{P2_7/TX_IND}
10 _{P1_1}
11 _{P1_2/SCL}
12 _{P1_3/SDA}
BT_RF ³⁰
GND ²⁹
P0_2 ^{28 P0_2}
P0_7 ^{27 P0_7}
P3_5 ^{26 P3_5}
P3_4 ^{25 P3_4}
P3_3 ^{24 P3_3}
P3_2 ^{23 P3_2}
P3_1 ^{22 P3_1}
UART_TX ^{21 UART_TX}
UART_RX ^{20 UART_RX}
UART Interface
VCC
R2
4.7k
RST
C2
1uF
GND
Antenna Matching
L1
1nH
C3
C4
ANT1
GND
GND
LED Option
VCC
R1 ^LD1
P0_2
330
Configurable I/O
P0_0
P2_4
P0_7
P2_7
P1_0
P3_1
P1_1
P3_2
P1_2
P3_3
P1_3
P3_4
P2_2
P3_5
P2_3
P3_6