NuMaker-LoRaD470/868/915-M252
Dec. 21, 2020
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4.4
LoRa Module
Figure 4-3 shows the LoRa Module circuit. RYLR890 and RYLR400 support the same footprint, but
different frequency band range. Before developing LoRa application at NuMaker-LoRaD-M252, please
refer the following order number to select LoRa frequency band range.
RYLR890 for 868/915 MHz (Order Number: NK-LDMM252/NK-LDHM252)
RYLR400 for 470 MHz (Order Number: NK-LDLM252)
Figure 4-4 LoRa Module Circuit
CT6
10uF/10V
TANT-A
1
2
U3
TPS79918DDCTG4
OUT
5
NC
4
IN
1
GND
2
EN
3
VDD
C22
1u
C0603
PD15_LoRa_TCXO_EN
R18
0
J10
SMA
1
2
3
4
5
LoRa Module only supports 1.8v ~ 3.6v voltage. This means
VDD cannot be selected to 5V power.
MCUVCC_DIODE
GND
VDD
O f f - page Connect or
Tit le
Size
Docum ent Num ber
Rev
Dat e:
Sheet
of
NuMaker-LoRaD-M252
v1.1
LoRa Module
A
4
4
Monday , August 03, 2020
U2
RY LR890/RY LR400
DIO2
5
SCK
14
DIO5
8
DIO1
4
GND
11
VDD
12
VDD
13
MOSI
16
DIO0
3
DIO3
6
NRESET
2
DIO4
7
GND
10
TCXO_VDD
9
MISO
15
NSS
17
FEM_CTX
18
RF
19
GND
20
GND
1
PC7_LoRa_DIO1
PC6_LoRa_DIO0
PB8_LoRa_DIO2
PB9_LoRa_DIO3
PB10_LoRa_DIO4
PB11_LoRa_DIO5
PD0_LoRa_SPI_MOSI
PD3_LoRa_SPI_SS
PD1_LoRa_SPI_MISO
PD2_LoRa_SPI_CLK
PF6_LoRa_nRESET
VDD
