Portable Weather Station Board
User’s Guide
2016 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
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Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
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•
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•
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QUALITYMANAGEMENTSYSTEM
CERTIFIEDBYDNV
== ISO/TS16949==
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Silicon Storage Technology is a registered trademark of
Microchip Technology Inc. in other countries.
GestIC is a registered trademarks of Microchip Technology
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All other trademarks mentioned herein are property of their
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© 2016, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
ISBN:
2016 Microchip Technology Inc.
PORTABLE WEATHER STATION
BOARD USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 5
Introduction............................................................................................................ 5
Document Layout .................................................................................................. 5
Conventions Used in this Guide ............................................................................ 6
Warranty Registration............................................................................................ 7
Recommended Reading........................................................................................ 7
The Microchip Web Site ........................................................................................ 8
Development Systems Customer Change Notification Service ............................ 8
Customer Support ................................................................................................. 9
Revision History .................................................................................................... 9
Chapter 1. Introduction to Portable Weather Station Board
1.1 Overview ...................................................................................................... 10
1.1.1 XLP Technology ........................................................................................ 10
1.2 Hardware ...................................................................................................... 12
1.2.1 LCD Display .............................................................................................. 13
1.2.2 Deep Sleep/Wake-up Push Button (SW1) ................................................. 13
1.2.3 CR2032 Battery Holder (BT1) ................................................................... 13
1.2.4 Ambient Light Sensor (Q2) ........................................................................ 13
1.2.5 Temperature Sensor (U4) ......................................................................... 13
1.2.6 AA Power Jumper (JP1) ............................................................................ 14
1.2.7 mTouch™ Navigation Touch Pads (Left, Select and Right) ...................... 14
1.2.8 AA Battery Holder (BT2) ............................................................................ 14
1.2.9 Humidity Sensor (U3) ................................................................................ 14
1.2.10 Air Quality Sensor (U5) ........................................................................... 14
1.2.11 Boost Regulator (U2) ............................................................................... 15
Chapter 2. Demonstration Application on PWSB
2.3 Startup .......................................................................................................... 17
2.4 Sections of the Demo ................................................................................... 17
2.4.1 Time ......................................................................................................... 18
2.4.2 Date ........................................................................................................... 18
2.4.3 Temperature .............................................................................................. 19
2.4.4 Humidity .................................................................................................... 19
2.4.5 Ambient Light ............................................................................................ 19
2.4.6 Air Quality .................................................................................................. 20
2.4.7 Sleep Mode ............................................................................................... 20
2.4.8 Deep Sleep Mode ...................................................................................... 20
2.4.9 Vbat Mode ................................................................................................. 21
2.4.10 USB CDC Basic Demo ............................................................................ 21
Chapter 3. Troubleshooting
2016 Microchip Technology Inc.
page 3
Portable Weather Station Board User’s Guide
Appendix A. PWSB Schematics
Appendix B. LCD Panel Information
Worldwide Sales and Service .....................................................................................29
page 4
2016 Microchip Technology Inc.
PORTABLE WEATHER STATION
BOARD USER’S GUIDE
Preface
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from those in this document. Please refer to our web site
(www.microchip.com) to obtain the latest documentation available.
Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the
document.
For the most up-to-date information on development tools, see the MPLAB® IDE online help.
Select the Help menu, and then Topics to open a list of available online help files.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
PIC24FJ128GC010. Items discussed in this chapter include:
•
•
•
•
•
•
•
•
Document Layout
Conventions Used in this Guide
Warranty Registration
Recommended Reading
The Microchip Web Site
Development Systems Customer Change Notification Service
Customer Support
Revision History
DOCUMENT LAYOUT
The document is organized as follows:
• Chapter 1. “Introduction to Portable Weather Station Board” – This chapter
introduces the Portable Weather Station Board (PWSB) and provides an overview
of its features.
• Chapter 2. “Demonstration Application on PWSB” – This chapter illustrates
PWSB preprogrammed application.
• Chapter 3. “Troubleshooting” – This chapter lists some troubleshooting
scenarios for user’s reference.
• Appendix A. “PWSB Schematics” – This appendix provides schematic
diagrams for the PWSB.
• Appendix B. “LCD Panel Information” – This appendix provides the LCD panel
information of the PWSB.
2016 Microchip Technology Inc.
page 5
Portable Weather Station Board User’s Guide
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description
Arial font:
Italic characters
Represents
Referenced books
Emphasized text
A window
A dialog
A menu selection
A field name in a window or
dialog
A menu path
MPLAB® IDE User’s Guide
...is the only compiler...
the Output window
the Settings dialog
select Enable Programmer
“Save project before build”
A dialog button
A tab
A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
A key on the keyboard
Click OK
Click the Power tab
4‘b0010, 2‘hF1
Italic Courier New
Sample source code
Filenames
File paths
Keywords
Command-line options
Bit values
Constants
A variable argument
Square brackets [ ]
Optional arguments
Curly brackets and pipe
character: { | }
Ellipses...
Choice of mutually exclusive
arguments; an OR selection
Replaces repeated text
#define START
autoexec.bat
c:\mcc18\h
_asm, _endasm, static
-Opa+, -Opa0, 1
0xFF, ‘A’
file.o, where file can be
any valid filename
mcc18 [options] file
[options]
errorlevel {0|1}
Initial caps
Quotes
Underlined, italic text with
right angle bracket
Bold characters
N‘Rnnnn
Text in angle brackets < >
Courier New font:
Plain Courier New
Represents code supplied by
user
page 6
Examples
File>Save
Press <Enter>, <F1>
var_name [,
var_name...]
void main (void)
{ ...
}
2016 Microchip Technology Inc.
Preface
WARRANTY REGISTRATION
Please complete the enclosed Warranty Registration Card and mail it promptly.
Sending in the Warranty Registration Card entitles users to receive new product
updates. Interim software releases are available at the Microchip web site.
RECOMMENDED READING
This user's guide describes how to use PIC24FJ128GC010. Other useful documents
are listed below. The following Microchip documents are available and recommended
as supplemental reference resources.
Release Notes for MPLAB ICD 3 In-Circuit Debugger
For the latest information on using PIC24FJ128GC010, read the “Readme for
PIC24FJ128GC010.htm” file (an HTML file) in the Readmes subdirectory of the
MPLAB IDE installation directory. The release notes (Readme) contains update information and known issues that may not be included in this user’s guide.
2016 Microchip Technology Inc.
page 7
Portable Weather Station Board User’s Guide
THE MICROCHIP WEB SITE
Microchip provides online support via our web site at www.microchip.com. This web
site is used as a means to make files and information easily available to customers.
Accessible by using your favorite Internet browser, the web site contains the following
information:
• Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
DEVELOPMENT SYSTEMS CUSTOMER CHANGE NOTIFICATION SERVICE
Microchip’s customer notification service helps keep customers current on Microchip
products. Subscribers will receive e-mail notification whenever there are changes,
updates, revisions or errata related to a specified product family or development tool of
interest.
To register, access the Microchip web site at www.microchip.com, click on Customer
Change Notification and follow the registration instructions.
The Development Systems product group categories are:
• Compilers – The latest information on Microchip C compilers, assemblers, linkers
and other language tools. These include all MPLAB C compilers; all MPLAB
assemblers (including MPASM™ assembler); all MPLAB linkers (including
MPLINK™ object linker); and all MPLAB librarians (including MPLIB™ object
librarian).
• Emulators – The latest information on Microchip in-circuit emulators.This
includes the MPLAB REAL ICE™ and MPLAB ICE 2000 in-circuit emulators.
• In-Circuit Debuggers – The latest information on the Microchip in-circuit
debuggers. This includes MPLAB ICD 3 in-circuit debuggers and PICkit™ 3
debug express.
• MPLAB® IDE – The latest information on Microchip MPLAB IDE, the Windows®
Integrated Development Environment for development systems tools. This list is
focused on the MPLAB IDE, MPLAB IDE Project Manager, MPLAB Editor and
MPLAB SIM simulator, as well as general editing and debugging features.
• Programmers – The latest information on Microchip programmers. These include
production programmers such as MPLAB REAL ICE in-circuit emulator, MPLAB
ICD 3 in-circuit debugger and MPLAB PM3 device programmers. Also included
are nonproduction development programmers such as PICSTART® Plus and
PICkit 2 and 3.
page 8
2016 Microchip Technology Inc.
Preface
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Customers should contact their distributor, representative or FAE for support. Local
sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document.
Technical support is available through the web site at:
http://www.microchip.com/support.
REVISION HISTORY
Revision A (March 2016)
This is the initial release of this document.
2016 Microchip Technology Inc.
page 9
PORTABLE WEATHER STATION
BOARD USER’S GUIDE
Chapter 1. Introduction to Portable Weather Station Board
The Portable Weather Station Board (PWSB) is a customer engagement board,
intended to demonstrate the on-chip peripheral features of PIC24 GC “Intelligent
Analog” family of devices.
1.1
OVERVIEW
The PWSB demo intends to showcase Analog, Capacitive touch, LCD, RTCC, VBAT
and XLP features of PIC24FJ128GC010 microcontrollers. For more information refer
to http://www.microchip.com/PIC24FJ128GC010.
• Analog features:
- A high-speed (up to 10 Msps), 12-bit A/D converter with multiple input channels
- A high-resolution, 16-bit Sigma-Delta A/D converter with two input channels
- mTouch™ capacitive sensing with multiple input channels
• Analog sensors that are interfaced with A/D converters include:
- Ambient Light sensor
- Temperature sensor
- Humidity sensor
- Air Quality sensor
The PIC24F device drives an on-board Dot-Matrix LCD (8 commons by 59 Segments).
The LCD displays the sensor readings and Real-Time Clock and Calendar (RTCC).
This demo uses an 8 MHz external crystal and runs at 16 MHz (8 MIPS).
1.1.1
XLP Technology
XLP technology uses a combination of proprietary process geometry design techniques, as well as power management features, to reduce power consumption wherever possible. A key part of this strategy is the use of operating modes: a range of
software-selectable hardware configurations that allow an application to change its
power consumption during run time are implemented.
The demo has five selectable operating modes:
• Idle mode: CPU is OFF. All peripherals are ON. LCD displays either sensor readings
or RTCC.
• Run mode: CPU and peripherals are ON. LCD displays either sensor readings or
RTCC.
• Sleep mode: CPU and peripherals (except RTCC and LCD) are OFF. All sensors
are turned OFF. Touch buttons are inactive. LCD Screen displays time in hh:mm
format. The screen gets updated once every minute.
• Deep Sleep mode: CPU and peripherals (except RTCC) are OFF. The device can
wake up from deep sleep using INT0 interrupt (Wake-up Switch assertion).
• VBAT mode: RTCC runs with VBAT (no VDD supply).
2016 Microchip Technology Inc.
page 10
Introduction
For more information on power saving mode and XLP features refer to:
• XLP Application Note AN1267
http://www.microchip.com/wwwAppNotes/AppNotes.aspx?appnote=en541031
• Power saving features with deep sleep PIC24FRM
http://www.microchip.com/PIC24FJ128GC010
FIGURE 1-1:
DEMO MODES STATE MACHINE
VDD
Restore
VDD (2 AA) Restore
OR
Deep Sleep Wakeup
No
Yes
VBAT Mode
Initialize Peripherals
Enable RTCC
and
Timer Interrupt
Timer Interrupt
Idle
Assertion of
Wakeup (SW1)
Switch
Run Mode
Tasks Executed
Update LCD Screen
(Time Screen)
No Activity for
More than
3 Minutes
Sleep Mode
RTCC 1 min
Interrupt
Assertion of
SW1 Switch
Deep Sleep Mode
2016 Microchip Technology Inc.
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Portable Weather Station Board User’s Guide
1.2
HARDWARE
Figure 1-2 identifies the major components of the PWSB.
FIGURE 1-2:
PWSB - FRONT AND BACK VIEWS
1
2
12
11
10
3
4
9
5
6
7
8
Components of PWSB marked in Figure 1-2 are described in Table 1-1.
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2016 Microchip Technology Inc.
Introduction
TABLE 1-1:
PWSB COMPONENTS - FRONT AND BACK VIEWS
Number
Description
1
LCD Display
2
Deep Sleep/Wake-up Push Button (SW1)
3
CR2032 Battery Holder (VBAT)
4
Ambient Light Sensor (Q2)
5
Microchip MCP9700 Temperature Sensor (U4)
6
AA Power Jumper (JP1)
7
mTouch™ Navigation Touch Pads
8
AA Battery Holder (BT2)
9
Humidity Sensor (U3)
10
Air Quality Sensor (U5)
11
Microchip MCP16251 Boost Regulator
12
Microchip PIC24FJ128GC010 16-Bit MCU (U1)
Components listed in Table 1-1 are discussed in the following sections:
1.2.1
LCD Display
This LCD display panel is organized as a 59-segment by 8-column display. However,
the demo utilizes only a 54 x 8 dot-matrix array for alphanumeric or special characters.
The LCD panel is directly driven from the I/O pins of the PIC24FJ128GC010 microcontroller, a separate display controller is not required. Multiplexing of the display elements
is described in Appendix B. “LCD Panel Information”.
1.2.2
Deep Sleep/Wake-up Push Button (SW1)
This is normally a pulled-high push button connected to the port pin, RD0. Asserting
this button pulls down RD0 to logic low (ground). As described in 2.4.7 “Sleep Mode”
and 2.4.8 “Deep Sleep Mode” the demo application uses this switch to:
• Turn ON and OFF LCD backlight in Run mode
• Force the device to enter Deep Sleep mode from Sleep mode
• Wake up the device from Deep Sleep mode
1.2.3
CR2032 Battery Holder (BT1)
The CR2032 battery powers RTCC and Deep Sleep semaphore (DSGPRx) registers
of PIC24FJ128GC010 microcontroller in the absence of main VDD (AA batteries).
1.2.4
Ambient Light Sensor (Q2)
Q2 is an ambient light sensor (ALS-PT19) consisting of phototransistor in miniature
SMD, used to detect indoor ambient light level. The sensor is designed to output a current in the range of 1 μA to 200 μA, proportionate to the varying light flux, from 0 lux to
1000 lux.
Disclaimer: The ambient light measured is dependent on the resistor R8. In PWSB R8
is 30k resulting in a maximum ambient light measurement of 500 lux.
1.2.5
Temperature Sensor (U4)
Microchip’s MCP9700 is an analog temperature sensor and measures temperature
from -40°C to +150°C. The MCP9700 provides a low-cost solution for applications that
require measurement of a relative change of temperature.
The Temperate sensor is turned ON only in the Temperature screen.
2016 Microchip Technology Inc.
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Portable Weather Station Board User’s Guide
For more information on MCP9700 temperature sensor refer to data sheet
(DS20001942F)
www.microchip.com/MCP9700
Disclaimer:
The temperature sensor has an accuracy of ± 2°C (typical) from 0°C to +70°C
1.2.6
AA Power Jumper (JP1)
The jumper JP1 is used to power the board from two AA batteries. The default setting
is jumper mounted.
1.2.7
mTouch™ Navigation Touch Pads (Left, Select and Right)
There are three navigation buttons. The Charge Time Measurement Unit (CTMU) module is a constant current source used to detect the change in the pad's capacitance.
The buttons are covered in detail in 2.3 “Startup”.
A more detailed description of the CTMU module’s operation is provided in the “PIC24F
Family Reference Manual”, “Charge Time Measurement Unit (CTMU)” (DS39724).
Additional information on the mTouch™ system is available at
www.microchip.com/mtouch
1.2.8
AA Battery Holder (BT2)
Two AA batteries power up the PWSB board.
1.2.9
Humidity Sensor (U3)
U3 is a humidity-sensitive (HR31) resistor made from organic macromolecules. This
sensor can measure the humidity from 20% to 95% at temperatures between
0°C to 60°C.
The Humidity sensor is enabled only in Humidity screen.
Disclaimer:
In Humidity screen, the humidity sensor needs about a minute to stabilize.
1.2.10
Air Quality Sensor (U5)
U5 is an Air Quality sensor (MQ135) that is used for detecting NH3, NOx, alcohol, Benzene, smoke, CO2, etc.
It consists of a micro AL2O3 ceramic tube, Tin Dioxide (SnO2) sensitive layer, measuring electrode and heater, fixed into a crust made by plastic and stainless steel net. The
heater provides necessary work conditions for work of sensitive components.
The resistance value of the sensor varies based on the gases detected and their
concentration.
A specific alarm point or a relative message of pollution can be determined after
considering the temperature and humidity influence.
Disclaimer:
1. To provide accurate readings, the AQ sensor requires 24 hours of continuous
operation. However, this would cause a substantial battery drain. Hence, the
demo program readings are for educational purposes only, and should not be
used to qualitatively monitor/test the environmental air quality.
2. In Air Quality screen, the device will not enter in Sleep mode.
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2016 Microchip Technology Inc.
Introduction
1.2.11
Boost Regulator (U2)
U2, Microchip’s MCP16251 is a compact, high-efficiency, fixed frequency, synchronous
step-up DC-DC converter.
This booster is used to power the heater coil of the Air Quality sensor. The booster
gives a regulated 5V DC.
The Boost Regulator is turned ON only in the Air Quality screen.
For more information on MCP16251 Boost Regulator refer to data sheet (DS25173A)
www.microchip.com/MCP16251
Note:
2016 Microchip Technology Inc.
Data from the sensors is for indication only.
page 15
Portable Weather Station Board User’s Guide
page 16
2016 Microchip Technology Inc.
PORTABLE WEATHER STATION
BOARD USER’S GUIDE
Chapter 2. Demonstration Application on PWSB
This chapter describes the preprogrammed demonstration on the PWSB while giving
an introduction to the PWSB and an overview of its features. The topics covered are:
• Startup
• Sections of the Demo
2.3
STARTUP
On powerup, the LCD displays one of the following messages indicating the cause of
reset:
•
•
•
•
•
Device powered first time
Deep Sleep wake-up without VBAT
MCLR asserted
Power recycled with VBAT intact
Deep Sleep wake-up
This is followed by a time screen in 24-hour clock (hh:mm:ss) format.The three
mTouch™ touch pads are used by the demo code for data entry and navigation:
• Left Arrow (◄): Decrement the digit or go to the previous screen.
• Select ( ): Configure the time, date and/or set current digit.
• Right Arrow (►): Increment the digit or go to the next screen.
The mTouch™ software included in the application waits a preset time to verify whether
the pad has been touched. The application will not respond to a touch duration that
lasts less than 500 ms, a touch longer than that is logged as one tap.
2.4
SECTIONS OF THE DEMO
The demo application is divided into several user interface sections, with each section
utilizing a unique function of the microcontroller.
The sections are organized as a closed-loop menu, that is, the screens are navigated
using ► and ◄ keys. The sections are ordered as follows:
•
•
•
•
•
•
Time
Date
Temperature
Humidity
Ambient Light
Air Quality
Some sections (e.g., configuring time) have sub-menus, which are selected using the
( ) pad. Detailed information on these section follows.
Power Save modes: The two power-save modes implemented in this demo are:
• Sleep Mode
• Deep Sleep Mode
After setting the Time and Date, press ► to return to the Demo.
2016 Microchip Technology Inc.
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Portable Weather Station Board User’s Guide
2.4.1
Time
The 24-hour time is the home page for the demo. This is a 24-hour time in hh:mm:ss
format. The RTCC module is clocked using a 32 kHz on board crystal oscillator.
To set the clock:
1. Press
when the LCD is displaying the time.
2. The display shows, hh:mm:ss, where ‘hh’ is the current hour, ‘mm’ is the current
minute and ‘ss’ is the current second. The first hours digit begins to blink, indicating that it is the current digit to be set.
3. Press the ◄ to decrement the hours digit or press ► to increment the digit. Since
this is a 24-hour setting, the digits cycle through 0 > 1 > 2 > 0....
4. When the correct digit is displayed, press to save it. The current digit stops
blinking and the next digit begins to blink.
5. Repeat Step 2 through Step 4 for each of the remaining digits until the display is
showing the correct time.
Note:
While setting the time, the PWSB does not allow returning to the previous
digit. If there is an error while making the settings or after pressing , the
time setting process must be started all over again.
The time LCD display is available in Run mode and Sleep mode.
Once the Time is set and running, press ► to go to the Date screen.
2.4.2
Date
Date is displayed in mm:dd:yy format in this section. To reset the date, follow the same
procedure given for time setting.
Note 1:
While setting the date, the PWSB does not allow returning to the previous
digit. If there is an error while making the settings or after pressing , the
date setting process must be started all over again.
2:
If the user sets an invalid date, it will be rejected. The date setting process
will automatically start again from the first digit.
The Date LCD display is available in Run mode only.
Once the Date is set, press ► to go to the next Demo screen.
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2016 Microchip Technology Inc.
Demonstration Application on PWSB
2.4.3
Temperature
Microchip MCP9700 analog temperature sensor (U4) is used to measure the ambient
temperature. This sensor converts the temperature to analog voltage which is measured by the microcontroller using Pipeline ADC.
The demo displays the current temperature in degree Celsius (°C).
The Temperature LCD display is available in Run mode only.
2.4.4
Humidity
HR31 humidity sensor is a humidity sensitive resistor made from organic macromolecules. It can be used in hospitals, storage rooms, workshops, production floors,
restrooms, gardens, laboratories and more.
The humidity range varies from 20% to 95% for temperature 0°C to 60°C.
The Humidity LCD display is available in Run mode only.
2.4.5
Ambient Light
ALSPT19 ambient light sensor (Q2) is used to obtain the ambient light. This sensor
consists of a phototransistor which converts light to relative current giving an analog
voltage measured by the microcontroller using Pipeline ADC.
The demo displays the ambient light in the units of Lux.
The Ambient Light LCD display is available in Run mode only.
2016 Microchip Technology Inc.
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Portable Weather Station Board User’s Guide
2.4.6
Air Quality
Air quality sensor, MQ135, measures the quality of air. MQ135 is sensitive to NH3,NOx,
alcohol, Benzene, smoke, CO2, etc. The sensor gives the concentration of these air
pollutants which is displayed on the LCD as PPM of pollutant.
The Air Quality LCD display is available in Run mode only.
2.4.7
Sleep Mode
The PWSB enters Sleep mode when there is no activity on the board for more than 3
minutes. The PIC24FJ128GC010 device provides the ability to manage power consumption by selectively managing clocking to the CPU and the peripherals. For more
information on Sleep mode, please refer to the device data sheet at:
www.microchip.com/PIC24FJ128GC010
On entering Sleep mode the LCD backlight is turned off and the display switches to
Time screen, which shows time in hh:mm format.
In Sleep mode:
• RTCC is active.
• LCD is active.
• All other peripherals including mTouch buttons are inactive.
2.4.8
Deep Sleep Mode
The device enters into Deep Sleep mode when the wake-up (SW1) switch is asserted
in Sleep mode. Deep Sleep mode consumes the lowest levels of power available from
the instruction-based modes of the PIC24FJ128GC010 device.
Note 1:
2:
Before entering Deep Sleep mode, the LCD displays following message.
LCD screen goes blank in Deep Sleep mode.
On asserting the wake-up switch, the PWSB reverts to active mode by device reset,
the Time screen is displayed by default.
In Deep Sleep mode:
• RTCC is ON.
• All other peripherals including LCD and mTouch buttons are OFF.
page 20
2016 Microchip Technology Inc.
Demonstration Application on PWSB
2.4.9
VBAT MODE
The device enters VBAT mode when the main power supply on VDD fails. The power
supplied on VBAT only runs two systems: RTCC and Deep Sleep Semaphore Data registers (DSGPR0 and DSGPR1).
Note:
LCD display is not available in VBAT mode.
To demonstrate the VBAT, remove the 'AA' jumper JP1 for 30 seconds. Replace the
jumper, and a message 'Power Recycled with VBAT intact' will scroll across the
screen. Notice that the displayed time is correct, as the RTCC is still running with the
primary power (VDD) removed.
TABLE 2-2:
CURRENT CONSUMPTION IN DIFFERENT OPERATING MODES
Operating Mode
Current
Comments
Idle
2.2 mA
Run
2.5 mA
Peripherals and Core are ON. LCD in Time screen.
Sleep
0.5 mA
Only LCD and RTCC peripherals are ON.
Deep Sleep
1.2 A
Only RTCC and RAM registers are ON.
VBAT
800 nA
RTCC and Deep Sleep semaphore registers are ON.
Note:
2.4.10
Peripherals are ON, Core is OFF.
All the readings are taken for 3.0V VDD and 8 MIPS.
USB CDC Basic Demo
To run the CDC demo, connect the PWSB board to a computer using a USB cable and
launch a terminal program. When the switch SW1 is asserted, the device will echo the
message “Button pressed.” to the terminal window. When the user types a key in
the terminal window, the device will increment the received value and echo the key
resulting from the incremented value. For example, if the user types “a”, the device will
echo “b”.
For more information on this demo refer to “CDC Basic Demo” of the “Microchip Libraries for Applications (MLA) – USB Library”.
2016 Microchip Technology Inc.
page 21
PORTABLE WEATHER STATION
BOARD USER’S GUIDE
Chapter 3. Troubleshooting
This chapter discusses common operational issues and how to resolve them.
1. The demo application does not run.
The PWSB must be powered using two AA batteries. Ensure that the batteries are new
and they are installed correctly. Also, ensure that the Jumper JP1 is mounted.
Note:
Rechargeable batteries are not recommended.
2. The Humidity sensor reading is not accurate.
The humidity of the environment varies from place to place. So the sensor shows
different values when measured at different locations. Ensure that no moisture is
collected on the humidity sensor.
3. The Air Quality sensor reading is not correct.
The Air Quality sensor needs 5V for its coil through on-board boost regulator. Ensure
that the batteries are new.
4. The light sensor’s reading saturates under some bright light conditions.
The voltage generated by Q2 is set by resistor, R8. The default value is 30 kΩ, so it can
measure a maximum brightness of 500 lux.
5. Device does not wake-up from deep sleep.
Ensure that the batteries are not dead or low on charge.
2016 Microchip Technology Inc.
page 22
PORTABLE WEATHER STATION
BOARD USER’S GUIDE
Appendix A. PWSB Schematics
FIGURE A-3:
PORTABLE WEATHER STATION BOARD, SHEET 1 (PIC24FJ128GC010
MICROCONTROLLER)
C7
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
SE G23
SE G24
SE G25
SE G26
SE G27
SE G28
SE G29
SE G30
SE G41
GND
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
L CD SE G5
L CD COM1
L CD COM2
L CD SE G6
L CD SE G7
L CD SE G8
L CD COM3
L CD COM4
L CD SE G9
L CD SE G10
L CD SE G21
L CD SE G22
L CD COM5
L CD COM8
V BAT
10μF
10V
C2
MQ135 E nable
L T TE MP HUM E NABL E
Backlight
0.1uF
L CD SE G4
L CD SE G3
L CD SE G2
L CD SE G1
GND
RG6/AN17
RG7/AN18
RG8/AN19
VDD
MCL R
L CD SE G12
C3
0.1uF
L CD
L CD
L CD
L CD
L CD
L CD
L CD
PGC
PGD
SE G13
SE G14
SE G15
SE G16
SE G17
SE G18
SE G19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
RG15
VDD
RE 5
RE 6
RE 7
RC1
RC2
RC3
RC4
RG6
RG7
RG8
MCL R
RG9
VSS
VDD
RA0
RE 8
RE 9
RB5
RB4
RB3
RB2
RB1
RB0
PIC24FJ128GC010
VSS
RC14
RC13
RD0
RD11
RD10
RD9
RD8
RA15
RA14
VSS
OSCO/RC15
OSCI/RC12
VDD
RA5
RA4
RA3
RA2
D+/RG2
D-/RG3
VUSB3V3
VBUS/RF7
RF8
RF2
RF3
RB6
RB7
RA9
R A 10
A V DD
A V SS
SV SS
CH0+
CH0CH1+
CH1SV DD
RA1
R F13
R F12
R B 12
R B 13
R B 14
R B 15
V SS
V DD
R D14
R D15
R F4
R F5
L CD SE G11
U1
RE4
RE3
RE2
R G13
R G12
R G14
RE1
RE0
RA7
RA6
R G0
R G1
R F1
R F0
V BAT
V CA P
R D7
R D6
R D5
R D4
R D13
R D12
R D3
R D2
R D1
VDD
Y2
Sw1
L CD SE G42
L CD SE G43
L CD SE G44
L CD SE G45
L CD SE G46
L CD SE G47
OSCO
OSCI
32.768kHz
C20
12pF
GND
VDD
C21
12pF
GND
GND
L CD SE G20
L CD SE G48
L CD SE G49
L CD SE G50
D+/USB
D-/USB
C6
0.1uF
VDD
GND
VBUS
L CD SE G51
L CD SE G52
L CD SE G53
VDD
C10
C4
VDD
GND
GND
SE G34
SE G33
SE G32
SE G31
VDD
C5
0.1uF
0.1uF
L CD
L CD
L CD
L CD
R A 1/A N26
L CD SE G39
L CD SE G38
L CD COM6
L CD SE G37
L CD SE G36
L CD SE G35
CH1+
CH0+
R B 6/A N6
L CD COM7
L CD SE G54
L CD SE G40
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
GND
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
0.1uF
GND
03-00081_Rev_0.3.SchDoc
2016 Microchip Technology Inc.
page 23
PORTABLE WEATHER STATION BOARD, SHEET 2 (OTHER ON-BOARD CIRCUITS)
R13
VDD
Backlight
CAP TOUCH BUTTONS (THREE)
100
3
VSS
4
PGD
5
PGC
C16
0.1uF
PGD
C1
0.
PGC
6
N.C.
OSCI
2
OSCO
8MHz
1
Y1
C8
18pF
C9
18pF
GND
L CD SE G54
MQ135 COIL SUPPLY BOOSTER
VDD
U2
L1
1
GL FR1608T 4R7M-L R
445-3607-1-ND
SW
2
3
GND
EN
VFB
6
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
SE G11
SE G12
SE G13
SE G14
SE G15
SE G16
SE G17
SE G18
SE G19
SE G20
SE G31
SE G32
SE G33
SE G34
SE G35
SE G36
SE G37
SE G38
SE G39
SE G40
SE G54
SE G55
SE G56
SE G57
SE G58
SE G59
C
GND
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
SE G1
SE G2
SE G3
SE G4
SE G5
SE G6
SE G7
SE G8
SE G9
SE G10
SE G21
SE G22
SE G23
SE G24
SE G25
SE G26
SE G27
SE G28
SE G29
SE G30
SE G41
SE G42
SE G43
SE G44
SE G45
SE G46
SE G47
SE G48
SE G49
SE G50
SE G51
SE G52
SE G53
5
Touch pads
SE G1
SE G2
SE G3
SE G4
SE G5
SE G6
SE G7
SE G8
SE G9
SE G10
SE G21
SE G22
SE G23
SE G24
SE G25
SE G26
SE G27
SE G28
SE G29
SE G30
SE G41
SE G42
SE G43
SE G44
SE G45
SE G46
SE G47
SE G48
SE G49
SE G50
SE G51
SE G52
SE G53
1k
1k
Left
R3
RG8/AN19
1k
+5V
MQ135 E nable
U5
1
A
B
H
3
A
6
B
CH1+
5
H
4
MQ135 AIR Quality Sensor
C18
C19
0E
C12
10μF
10V
R5
Select
R2
RG7/AN18
VBUS
R4
3.09M
Right
R1
RG6/AN17
2
R16
4
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD
L CD1
L CD 67PIN
+5V
MCP16251T -I/CH
R6
4.7k
MQ135 E nable
C11
4.7μF
10V
VIN
GND VOUT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
L CD COM1
L CD COM2
L CD COM3
L CD COM4
L CD COM5
L CD COM6
L CD COM7
L CD COM8
L CD SE G11
L CD SE G12
L CD SE G13
L CD SE G14
L CD SE G15
L CD SE G16
L CD SE G17
L CD SE G18
L CD SE G19
L CD SE G20
L CD SE G31
L CD SE G32
L CD SE G33
L CD SE G34
L CD SE G35
L CD SE G36
L CD SE G37
L CD SE G38
L CD SE G39
L CD SE G40
MCL R
2
VDD
R18
4.7k
R17
1
A
J2
MCL R
C
A
330R
J1
D-/USB
D+/USB
1
2
3
4
5
1M
R14
1k
0.1uF
R15
20k
VBUS
DD+
GND
0.1uF
GND
GND
MQ135 AIR QUALITY SENSOR
SHL D
GND
CON_USB_MINI_B_HIROSE
GND
GND
3
2
0.1uF
R12
1
100
2
3
GND
GND
R7
100k
U4
Sw1
C17
0.1uF
L T TE MP HUM E NABLE
VBAT
Q2
L IGHT SE NSOR AMBIENT SMD
NC
NC
5
CH0+
U3
RA1/AN26
1
GND
Vout
JP1
BT1(VBAT)
1
1
VDD
Vdd
4
R8
30k
C14
0.1uF
MCP9700T -E /LT
MCP9700T -E /LTTR-ND
C13
0.1uF
2
2
4
HR31 HUMIDITY SENSOR
L T TE MP HUM E NABLE
1
C15
R11
4.7k
SW1
ALS-PT-19 T LIGHT SENSOR
L T TE MP HUM E NABL E
2
2016 Microchip Technology Inc.
MCP9700 TEMPERATURE SENSOR
VDD
BT 2
BC2AAPC
HR31
RB6/AN6
GND
GND
GND
GND
BATTER POWER SUPPLY
Portable Weather Station Board User’s Guide
page 24
FIGURE A-4:
2016 Microchip Technology Inc.
TABLE A-3:
Quantity
BILL OF MATERIALS
Designator
Description
Manufacturer 1
Manufacturer
Part Number 1
Supplier 1
Supplier Part
Number 1
4
R1, R2, R3, R14 RES SMD 1K OHM 1% 1/10W 0603
Yageo
RC0603FR-071KL
Digi-Key
311-1.00KHRCT-ND
2
R12, R17
RES SMD 100 OHM 5% 1/10W 0603
Yageo
RC0603JR-07100RL
Digi-Key
311-100GRCT-ND
1
R13
RES SMD 330 OHM 5% 1/10W 0603
Yageo
RC0603JR-07390RL
Digi-Key
311-390GRCT-ND
1
R15
RES SMD 20K OHM 5% 1/10W 0603
Yageo
RC0603JR-0720KL
Digi-Key
311-20KGRCT-ND
1
R16
RES SMD 0E OHM 1% 1/10W 0603
Yageo
RC0603FR-071KL
Digi-Key
311-1.00KHRCT-ND
1
R5
RES SMD 1M OHM 1% 1/10W 0603
Yageo
RC0603FR-071ML
Digi-Key
311-1.00MHRCT-ND
3
R6, R11, R18
RES SMD 4.7K OHM 5% 1/10W 0603
Yageo
RC0603JR-074K7L
Digi-Key
311-4.7KGRCT-ND
1
R7
RES SMD 100K OHM 5% 1/10W 0603
Yageo
RC0603JR-07100KL
Digi-Key
311-100KGRCT-ND
1
R8
RES SMD 30K OHM 5% 1/10W 0603
Yageo
RC0603JR-0730KL
Digi-Key
311-30KGRCT-ND
14
C1, C2, C3, C4,
C5, C6, C10,
C13, C14, C15,
C16, C17, C18,
C19
CAP CER 0.1UF 25V 10% X7R 0603
Vishay Vitramon
VJ0603Y104KXXCW1BC
Digi-Key
720-1379-1-ND
1
R4
RES SMD 3.09M OHM 1% 1/10W 0603
Vishay Dale
CRCW06033M09FKEA
Digi-Key
541-3.09MHTR-ND
1
Y1
CRYSTAL 8MHZ 18PF
TXC CORPORATION
9C-8.000MAAJ-T
Digi-Key
887-1048-1-ND
1
SW1
SWITCH TACTILE SPST-NO 0.05A 12V
TE Connectivity Alcoswitch
Switches
FSM4JSMATR
Digi-Key
450-1759-1-ND
page 25
1
L1
FIXED IND 4.7UH 500MA 240 MOHM
TDK Corporation
GLFR1608T4R7M-LR
Digi-Key
445-3607-1-ND
2
C8, C9
CAP CER 18PF 50V 5% C0G 0603
TDK Corporation
C1608C0G1H180J080AA
Digi-Key
445-1272-6-ND
2
C7, C12
CAP CER 10UF 10V 10% X5R 0805
Samsung Electro-Mechanics CL21A106KPCLQNC
America, Inc.
Digi-Key
1276-2402-1-ND
1
BT2
HOLDER BATT 2-AA CELLS PC MNT
MPD (Memory Protection
Devices)
BC2AAPC
Digi-Key
BC2AAPC-ND
1
U2
IC REG BST ADJ 0.65A SYNC SOT23
Microchip Technology
MCP16251T-I/CH
Digi-Key
MCP16251T-I/CHCTND
1
U4
SENSOR TEMP RATIOMETRIC SC70-5 Microchip Technology
MCP9700T-E/LT
Digi-Key
MCP9700T-E/LTTRND
1
C11
CAP CER 4.7UF 10V 10% X5R 0805
Kemet
C0805C475K8PACTU
Digi-Key
399-3133-6-ND
1
Q2
LIGHT SENSOR AMBIENT SMD
Everlight Electronics Co Ltd
ALS-PT19-315C/L177/
TR8
Digi-Key
1080-1244-1-ND
Quantity
BILL OF MATERIALS
Designator
Description
Manufacturer
Part Number 1
Manufacturer 1
Supplier Part
Number 1
Supplier 1
2
C20, C21
CAP CER 12PF 50V NP0 0603
AVX Corporation
06035A120JAT2A
Digi-Key
478-1164-1-ND
1
Y2
CRYSTAL 32.7680KHZ 12.5PF SMD
Abracon LLC
AB26TRQ-32.768KHZ-T
Digi-Key
535-12051-1-ND
1
BT1 (VBAT)
HOLDER BATTERY COIN 20MM DIA
SMD
MPD (Memory Protection
Devices)
BK-912
Digi-Key
BK-912-ND
1
J1
Connector Receptacle USB - mini B
Hirose Electric Co Ltd
UX60-MB-5ST
Digi-Key
H2959CT-ND
1
JP1
Jumper
Sullins Connector Solutions
STC02SYAN
Digi-Key
S9000-ND
1
LCD1
59X8 Dot Matrix LCD
—
—
—
—
1
U1
MCU 16-Bit PIC24FJ128GC010-TQFP100 Pin
Microchip Technology
PIC24FJ128GC0101-I/PT
Microchip
Technology
PIC24FJ128GC0101
-I/PT
1
U3
Humidity Sensor
—
HR31
—
—
1
U5
Air Quality Sensor
—
MQ135
—
—
2016 Microchip Technology Inc.
Portable Weather Station Board User’s Guide
page 26
TABLE A-3:
PORTABLE WEATHER STATION
BOARD USER’S GUIDE
Appendix B. LCD Panel Information
This section provides specific pinout of the LCD display panel. This information is especially useful for those
who want to design custom applications using the PWSB.
The layout of the LCD Panel is shown in Figure B-5.
Table B-4 shows the mapping of the panel’s pins to display segments and commons.
FIGURE B-5:
LCD PANEL LAYOUT
2016 Microchip Technology Inc.
page 27
Portable Weather Station Board User’s Guide
TABLE B-4:
LCD Pin
LCD PINS
LCD
Function
GC010
Pin
LCD Pin
LCD
Function
GC010
Pin
1
COM1
COM0
35
SEG53
SEG12
2
COM2
COM1
36
SEG52
SEG40
3
COM3
COM2
37
SEG51
SEG41
4
COM4
COM3
38
SEG50
SEG55
5
COM5
COM4
39
SEG49
SEG56
6
COM6
COM5
40
SEG48
SEG29
7
COM7
COM6
41
SEG47
SEG42
8
COM8
COM7
42
SEG46
SEG43
9
SEG11
SEG50
43
SEG45
SEG13
10
SEG12
SEG1
44
SEG44
SEG14
11
SEG13
SEG48
45
SEG43
SEG15
12
SEG14
SEG34
46
SEG42
SEG16
13
SEG15
SEG35
47
SEG41
SEG20
14
SEG16
SEG2
48
SEG30
SEG21
15
SEG17
SEG3
49
SEG29
SEG22
16
SEG18
SEG4
50
SEG28
SEG44
17
SEG19
SEG5
51
SEG27
SEG45
18
SEG20
SEG28
52
SEG26
SEG23
19
SEG31
SEG11
53
SEG25
SEG24
20
SEG32
SEG10
54
SEG24
SEG25
21
SEG33
SEG39
55
SEG23
SEG26
22
SEG34
SEG38
56
SEG22
SEG46
23
SEG35
SEG9
57
SEG21
SEG49
24
SEG36
SEG8
58
SEG10
SEG57
25
SEG37
SEG19
59
SEG9
SEG58
26
SEG38
SEG54
60
SEG8
SEG59
27
SEG39
SEG53
61
SEG7
SEG60
28
SEG40
SEG37
62
SEG6
SEG61
29
SEG54
SEG36
63
SEG5
SEG62
30
SEG55
SEG36
64
SEG4
SEG32
31
SEG56
SEG36
65
SEG3
SEG51
32
SEG57
SEG36
66
SEG2
SEG33
33
SEG58
SEG36
67
SEG1
SEG52
34
SEG59
SEG36
—
—
—
page 28
2016 Microchip Technology Inc.
Worldwide Sales and Service
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://www.microchip.com/
support
Web Address:
www.microchip.com
Asia Pacific Office
Suites 3707-14, 37th Floor
Tower 6, The Gateway
Harbour City, Kowloon
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Tel: 86-592-2388138
Fax: 86-592-2388130
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Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
Denmark - Copenhagen
Tel: 45-4450-2828
Fax: 45-4485-2829
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Tel: 91-80-3090-4444
Fax: 91-80-3090-4123
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Tel: 33-1-69-53-63-20
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Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
Germany - Dusseldorf
Tel: 49-2129-3766400
Atlanta
Duluth, GA
Tel: 678-957-9614
Fax: 678-957-1455
Hong Kong
Tel: 852-2943-5100
Fax: 852-2401-3431
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
China - Beijing
Tel: 86-10-8569-7000
Fax: 86-10-8528-2104
Austin, TX
Tel: 512-257-3370
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
Boston
Westborough, MA
Tel: 774-760-0087
Fax: 774-760-0088
China - Chongqing
Tel: 86-23-8980-9588
Fax: 86-23-8980-9500
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
Cleveland
Independence, OH
Tel: 216-447-0464
Fax: 216-447-0643
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
Detroit
Novi, MI
Tel: 248-848-4000
Houston, TX
Tel: 281-894-5983
Indianapolis
Noblesville, IN
Tel: 317-773-8323
Fax: 317-773-5453
Los Angeles
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
New York, NY
Tel: 631-435-6000
San Jose, CA
Tel: 408-735-9110
Canada - Toronto
Tel: 905-673-0699
Fax: 905-673-6509
China - Dongguan
Tel: 86-769-8702-9880
China - Hangzhou
Tel: 86-571-8792-8115
Fax: 86-571-8792-8116
India - Pune
Tel: 91-20-3019-1500
Japan - Osaka
Tel: 81-6-6152-7160
Fax: 81-6-6152-9310
Japan - Tokyo
Tel: 81-3-6880- 3770
Fax: 81-3-6880-3771
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
China - Hong Kong SAR
Tel: 852-2943-5100
Fax: 852-2401-3431
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
China - Shenzhen
Tel: 86-755-8864-2200
Fax: 86-755-8203-1760
Taiwan - Hsin Chu
Tel: 886-3-5778-366
Fax: 886-3-5770-955
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Kaohsiung
Tel: 886-7-213-7828
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Germany - Karlsruhe
Tel: 49-721-625370
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Italy - Venice
Tel: 39-049-7625286
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Poland - Warsaw
Tel: 48-22-3325737
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
Sweden - Stockholm
Tel: 46-8-5090-4654
UK - Wokingham
Tel: 44-118-921-5800
Fax: 44-118-921-5820
Taiwan - Taipei
Tel: 886-2-2508-8600
Fax: 886-2-2508-0102
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
07/14/15
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2016 Microchip Technology Inc.