RN2483_15 Datasheet, PDF (8/20 Pages) Microchip Technology – Low-Power Long Range LoRa® Technology Transceiver Module

RN2483
3.0 TYPICAL HARDWARE CONNECTIONS
Figure 3-1 shows the typical hardware connections.
FIGURE 3-1:
HARDWARE CONNECTIONS
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Note 1: Optional handshake lines are supported in future firmware releases.
3.1 INTERFACE TO HOST MCU
The RN2483 module has a dedicated UART interface
to communicate with a host controller. Optional
handshake lines are supported in future firmware
releases. The “RN2483 LoRa^® Technology Module
Command Reference User’s Guide” (DS40001784)
provides a detailed UART command description.
Table 3-1 shows the default settings for the UART
communication.
TABLE 3-1: DEFAULT UART SETTINGS
Specification
Description
Baud Rate
Packet Length
Parity Bit
Stop Bits
Hardware Flow Control
57600 bps
8 bit
No
1 bit
No
3.2 GPIO PINS (GPIO0-GPIO13)
The module has 14 GPIO pins. These lines can be
connected to switches, LEDs, and relay outputs. The
pins can be either logic inputs or outputs, and some
pins have analog input capability that can be accessed
via the module firmware. These pins have limited sink
and source capabilities. Electrical characteristics are
described in Table 2-2. For more information, see
“RN2483 LoRa^® Technology Module Command
Reference User’s Guide” (DS40001784).
3.3 RF CONNECTIONS (RFL, RFH)
RFL is the RF analog port for the lower frequency band
(433 MHz) while RFH is for the higher frequency band
(868 MHz). When routing RF paths, use proper strip
lines with an impedance of 50 Ohm.
3.4 RESET PIN
The Reset pin of the module is an active-low logic
input.
3.5 POWER PINS
It is recommended to connect power pins (Pin 12 and
34) to a stable supply voltage with sufficient source
current. Table 2-3 shows the current consumption.
Additional filtering capacitors are not required but used
to ensure stable supply voltage in a noisy environment.
DS50002346B-page 8
 2015 Microchip Technology Inc.