Datasheet

RN4870/71
DS50002489D-page 26  2016-2019 Microchip Technology Inc.
FIGURE 5-2: RN4870 REFERENCE CIRCUIT
FIGURE 5-3: RN4870U REFERENCE CIRCUIT
RN4870
GND
1
GND
2
GND
3
VBAT
4
P2_2
5
VDD_IO
6
VDD_IO
7
ULPC_O
8
P2_3
9
BK_O
10
P2_7/TX_IND
11
P1_1
12
P1_2/SCL
13
P1_3/SDA
14
P0_0/CTS
15
P1_0
16
P3_6/RTS
17
P2_0/MODE
18
P2_4
19
NC
20
RST
21
UART_RX
22
UART_TX
23
P3_1
24
P3_2
25
P3_3
26
P3_4
27
P3_5
28
P0_7
29
P0_2
30
GND
31
GND
32
GND
33
U1
B
LD1
GND
GND
330
R1
GND
VCC
VCC
UART_TX
UART_RX
P0_2
P0_0 P1_0
P1_1
P1_2
P1_3
P0_7
P2_0
P2_2
P2_3
P2_4
P2_7
P3_1
P3_2
P3_3
P3_4
P3_5
P3_6
P0_7
P3_1
P3_2
P3_3
P3_4
P3_5
3
2
1
STS2301
Q1
P0_0
P1_0
P2_0
P2_4
P3_6
P1_1
P1_2
P1_3
P2_3
P2_7
P2_2
Configurable I/O
1
2
J1
GND
1
2
3
4
5
J2
GND
Power Input
Reverse Voltage Protection
Configuration Interface
VCC
UART_TX
UART_RX
UART Interface
LED Option
P0_2
10uF 6.3V X5R
C1
GND
4.7k
R2
VCC
1uF
C2
GND
RST
VDD
3
VOUT
1
VSS
2
MCP112
U2
GND
VCC
Reset Circuit
P2_0 MODE
Low
High
Test Mode
APP Mode
GND
1
VBAT
2
P2_2
3
VDD_IO
4
VDD_IO
5
ULPC_O
6
P2_3
7
BK_O
8
P2_7/TX_IND
9
P1_1
10
P1_2/SCL
11
P1_3/SDA
12
P0_0/CTS
13
P1_0
14
P3_6/RTS
15
P2_0/MODE
16
P2_4
17
NC
18
RST
19
UART_RX
20
UART_TX
21
P3_1
22
P3_2
23
P3_3
24
P3_4
25
P3_5
26
P0_7
27
P0_2
28
GND
29
BT_RF
30
RN4870U
U1
B
LD1
GND
GND
330
R1
GND
VCC
VCC
UART_TX
UART_RX
P0_2
P0_0 P1_0
P1_1
P1_2
P1_3
P0_7
P2_0
P2_2
P2_3
P2_4
P2_7
P3_1
P3_2
P3_3
P3_4
P3_5
P3_6
4.7k
R2
VCC
P0_7
P3_1
P3_2
P3_3
P3_4
P3_5
3
2
1
STS2301
Q1
P0_0
P1_0
P2_0
P2_4
P3_6
P1_1
P1_2
P1_3
P2_3
P2_7
P2_2
Configurable I/O
P2_0 MODE
Low
High
Test Mode
APP Mode
1
2
J1
GND
1
2
3
4
5
J2
GND
Power Input
Reverse Voltage Protection
Configuration Interface
VCC
UART_TX
UART_RX
UART Interface
LED Option
P0_2
C3 C4
ANT1
1nH
L1
10uF 6.3V X5R
C1
GND
1uF
C2
GND
GND
Antenna Matching
RST
VDD
3
VOUT
1
VSS
2
MCP112
U2
GND
VCC
Reset Circuit