LoRa
®
Mote User’s Guide
DS40001808B-page 14 2015-2016 Microchip Technology Inc.
2.3 HARDWARE DESCRIPTION
The RF signal paths are connected to the SMA edge connector and the designated via
through-hole point. The high-frequency (868/915 MHz band) RF signal is transmitted
through the RFH (J3) SMA connector. The low-frequency (433 MHz) RF signal is
transmitted via the through-hole point (RFL), this allows connection of a user-supplied
wire antenna.
The on-board PIC18LF45K50 MCU is programmable via ICSP™ through connector J2.
In addition, the PIC18LF45K50 MCU application program is capable of being updated
via the bootloader utility.
The Mote board will power-on automatically when a USB cable is connected. When
powered by AAA batteries, power-on/off is controlled using the (S3) switch
.
Mote environment data is measured by a light sensor (U4) and by a temperature sensor
(U5). There are two on-board push buttons (S2, S3) used for menu navigation and
selection. In addition, there are four LEDs. Two LEDs (D3-Orange, D4-Green) are
connected to the module’s GPIO10 and GPIO11 I/O’s. Two LEDs (D5-Red, D6-Green)
are connected to and controlled by the PIC18LF45K50 device.
Table 2-2 shows the LoRa
®
Mote PIC18LF45K50 connections:
Note: The North-American (915 MHz) module does not support the ability to
transmit a (433 MHz) low-frequency signal.
TABLE 2-2: MOTE PIC18LF45K50 USAGE
PIN Pin Name Description Mote Usage
General Purpose Pins
PORT A
17 RA0 USB_DET USB Power Detection (Digital, Input)
18 RA1 V
BAT Battery Voltage (Analog, ADC)
19 RA2 TEMP_SENSE
MCP9700 Thermistor Sensor (Analog, ADC) [NOT
USED; Requires {R7} population]
20 RA3 LIGHT_SENSE
ALS-PT19-315C Ambient Light Sensor (Analog
,ADC) [NOT USED; Requires {R15} population]
21 RA4 TP3 Test Point 3 [NOT USED]
22 RA5 SLEEP_PWR
MOSFET {Q2} Enable/Disable; Used for Sleep
Power Current Reduction
29 RA6 GREEN_LED Application Behavior Descriptor (Digital, Output)
28 RA7 RED_LED Application Behavior Descriptor (Digital, Output)
PORT B
8 RB0 S3 Push Button Application Navigation Controller (Digital, Input)
9 RB1 S2 Push Button Application Navigation Controller (Digital, Input)
10 RB2 DISPRST LCD Display Dedicated Reset Enable/Disable Pin
11 RB3 RD_E LCD Read Enable/Disable Pin
12 RB4 CS
LCD Chip Select Pin
13 RB5 MODRST Dedicated RN Module Reset Enable/Disable Pin
14 RB6 PGC ICSP™ Programmer
15 RB7 PGD ICSP™ Programmer
PORT C
30 RC0 A0 LCD Command/Data Select Pin
31 RC1 R/W LCD Read/Write Select Pin
