MattairTech MT-DB--U1 User manual

MT-DB-U1 Manual
December 30, 2015 1 http://www.mattairtech.com/

MT-DB-U1 Manual
Table of Contents
Overview........................................................................................................................4
Introduction.......................................................................................................................................4
MT-DB-U1 Features..........................................................................................................................4
AT90usb162 Features.......................................................................................................................5
MT-DB-U1 Hardware.....................................................................................................7
Layout / Header Pins.........................................................................................................................7
Solder Jumpers.................................................................................................................................8
Pin Descriptions................................................................................................................................9
PWM Filters.....................................................................................................................................10
Clock Source...................................................................................................................................10
HWB Jumper / RESET button / LED...............................................................................................10
ISP Header.....................................................................................................................................11
Power Configuration..................................................................................................12
USB Bus Powered -- 5V..................................................................................................................12
USB Bus Powered – 3.3V...............................................................................................................12
Externally Powered – 4.0V to 5.5V..................................................................................................13
Externally Powered – 3.0V to 3.6V..................................................................................................13
USB Shield......................................................................................................................................13
Arduino Compatibility (IDE 1.6.7)..............................................................................14
What's New.....................................................................................................................................14
Summary.........................................................................................................................................14
Special Notes..................................................................................................................................15
Pin Configurations...........................................................................................................................15
MT-DB-U6 (AT90USB64/AT90USB128).........................................................................................16
MT-DB-U4 (ATmega32U4)..............................................................................................................17
MT-DB-U1/MT-DB-U2 (AT90USB162/ATmega32U2).....................................................................17
Pin Capabilities...............................................................................................................................18
Using Arduino with MattairTech USB boards..................................................................................19
Serial Monitor..................................................................................................................................19
Updated Tone.cpp...........................................................................................................................19
Detailed Memory Usage Output After Compilation..........................................................................20
USB Technical Notes......................................................................................................................20
Installation.......................................................................................................................................21
Driver Installation............................................................................................................................21
Windows.........................................................................................................................................21
Linux...............................................................................................................................................22
OS X...............................................................................................................................................22
AVR Core Installation......................................................................................................................22
Uploading the First Sketch..............................................................................................................23
USB CDC Bootloader (Arduino compatible)....................................................................................23
Bootloader Firmware Installation Using the Arduino IDE.................................................................23
Using AVRDUDE Standalone.........................................................................................................24
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MT-DB-U1 Manual
Possible Future Additions................................................................................................................24
ChangeLog.....................................................................................................................................24
License and credits.........................................................................................................................25
CDC Bootloader (Arduino/AVRDUDE)......................................................................26
CDC Serial Driver............................................................................................................................26
CDC Bootloader..............................................................................................................................26
DFU Bootloader (FLIP/dfu-programmer)..................................................................28
FLIP..............................................................................................................................29
dfu-programmer..............................................................................................................................31
Running Demo Program............................................................................................32
Schematic....................................................................................................................33
Troubleshooting / FAQ...............................................................................................34
Support Information...................................................................................................34
Acknowledgments......................................................................................................34
Legal.............................................................................................................................35
Appendix A: Precautions...........................................................................................36
Appendix B: Other MattairTech Products................................................................37
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MT-DB-U1 Manual
Overview
Overview
Introduction
The MT-DB-U1 is a development board for the Atmel AT90usb162 USB microcontroller. The
AT90usb162 contains 16 KB of flash, 512 bytes SRAM, 512 bytes EEPROM, 22 programmable IO
pins, and a USB device controller. The board has 32 pins in a dual inline configuration with 100 mil pin
spacing and 600 mil row spacing which allows for easy mounting on a breadboard. It includes a mini
USB connector, status LED, 16MHz crystal, reset button, HWB boot jumper, 3 PWM filters, and ISP
header pads. A bootloader comes preinstalled which allows programming of the chip over USB
without an external programmer. The ISP header can be used with an external programmer for in-
system programming. This header can be reconfigured to allow the MT-DB-U1 itself to be an ISP
programmer, or to be used as a SPI master or slave. The board can be powered at 5V via USB, at
3.3V via the AT90usb162 internal regulator and USB, or it can be powered externally (3V – 3.6V or
4.0V – 5.5V). All programmable IO pins are routed to headers, including those used by on-board
hardware. The chip can be clocked externally, and the board is compatible with HV programming. The
USB connections are also routed to header pins, which allows for panel-mount USB connectors. The
PCB is high-quality with ENIG (gold-plated) finish, red soldermask, and white screenprinting showing
the pinout. It measures approximately 1.7” x 0.8” (42mm x 20mm) and is 0.062” (1.6mm) thick.
MT-DB-U1 Features
●AT90usb162 USB microcontroller
●16KB FLASH, 512 bytes SRAM, 512 bytes EEPROM
●USB device controller, Serial USART, and SPI communications
●2 timers with 5 PWM channels
●Arduino compatible (now supports IDE 1.6.7 and boards manager)
●CDC (Arduino/AVRDUDE) or DFU (FLIP) bootloader preinstalled
●ISP header pads (program chip using external programmer)
●16MHz crystal
●Green Status LED
●3 RC PWM filters on each output compare pin of 16-bit timer 1 (can be disconnected)
●Reset button
●Bootloader selection jumper
●Mini USB connector
●Can be powered via USB at 5V (Vbus) or 3.3V (AT90usb162 internal regulator)
●Can be powered externally at 3V to 3.6V or 4V to 5.5V
●All programmable IO pins routed to headers (including those used by on-board hardware)
●USB pins routed to header pins (for panel-mount USB connector)
●High-quality PCB with gold-plated finish and red soldermask
●DIL-32 board, standard 0.1" pin spacing. Can be mounted on a breadboard
●Measures approx. 1.7” x 0.8” (42mm x 20mm) and 0.062” (1.6mm) thick.
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MT-DB-U1 Manual
AT90usb162 Features
●High Performance, Low Power AVR®8-Bit Microcontroller
●Advanced RISC Architecture
125 Powerful Instructions – Most Single Clock Cycle
32 x 8 General Purpose Working Registers
Fully Static Operation
Up to 16 MIPS Throughput at 16 Mhz
●Non-volatile Program and Data Memories
16K Bytes of In-System Self-Programmable Flash
512 Bytes EEPROM
512 Bytes Internal SRAM
Write/Erase Cycles: 10,000 Flash/ 100,000 EEPROM
Data retention: 20 years at 85°C/ 100 years at 25°C(1)
Optional Boot Code Section with Independent Lock Bits
In-System Programming by on-chip Boot Program
True Read-While-Write Operation
Programming Lock for Software Security
●USB 2.0 Full-speed Device with Interrupt on Transfer Completion
Complies fully with Universal Serial Bus Specification REV 2.0
48 MHz PLL for Full-speed Bus Operation: 12 Mbit/s data rate
Fully independant 176 bytes USB DPRAM for endpoint memory
Endpoint 0 for Control Transfers: from 8 up to 64-bytes
4 Programmable Endpoints:
IN or Out Directions
Bulk, Interrupt and IsochronousTransfers
Programmable maximum packet size from 8 to 64 bytes
Programmable single or double buffer
Suspend/Resume Interrupts
Microcontroller reset on USB Bus Reset without detach
USB Bus Disconnection on Microcontroller Request
●Peripheral Features
One 8-bit Timer/Counters with Separate Prescaler and Compare
(two 8-bit PWM channels)
One 16-bit Timer/Counter with Prescaler, Compare and Capture
(three 8-bit PWM channels)
USART with SPI master mode and hardware flow control (RTS/CTS)
Master/Slave SPI Serial Interface
Programmable Watchdog Timer with Separate On-chip Oscillator
On-chip Analog Comparator
Interrupt and Wake-up on Pin Change
●On Chip Debug Interface (debugWIRE)
●Special Microcontroller Features
Power-On Reset and Programmable Brown-out Detection
Internal Calibrated Oscillator
External and Internal Interrupt Sources
5 Sleep Modes: Idle, Powersave, Powerdown, Stby., and Ext. Stby.
●I/O and Packages
22 Programmable I/O Lines
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MT-DB-U1 Manual
QFN32 (5x5mm) / TQFP32 packages
●Operating Voltages
2.7 – 5.5V
●Operating temperature
Industrial (-40°C to +85°C)
●Maximum Frequency
8 MHz at 2.7V - Industrial range
16 MHz at 4.5V - Industrial range
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MT-DB-U1 Manual
MT-DB-U1 Hardware
MT-DB-U1 Hardware
Layout / Header Pins
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MT-DB-U1 Manual
Solder Jumpers
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MT-DB-U1 Manual
Pin Descriptions
Pin Description
Gnd Ground
5V, Vbus 5V output from USB Vbus. Vbus pin and 5V pin are tied together.
Vcc Voltage input pin. Use solder jumper J8 to configure. This pin is connected
to the Vcc and AVcc pins on the microcontroller, as well as the ISP header
and reset pullup. See Power Configuration Section.
3.3V 3.3V output from the microcontroller internal 3.3V regulator. This pin is
connected to Ucap on the microcontroller.
X2 (C0) This pin can be connected to the XTAL2 pin of the microcontroller using
jumper J7. This is useful if pin C0 is used as GPIO (if external clock is
used). This pin is disconnected by default (onboard crystal is used).
X1 This pin can be connected to the XTAL1 pin of the microcontroller using
jumper J7. This is useful if an external clock is used. This is also useful for
HV programming or recovery from incorrectly set fuses. This pin is
disconnected by default (onboard crystal is used).
C2 GPIO pin (Port C) Consult datasheet for functionality.
D0 - D7 GPIO pins (Port D) Consult datasheet for functionality.
D0 / LED The green status LED is connected to this pin when solder jumper J2 is
set. The LED is connected to ground through a 240 ohm resistor. The user
application is free to use this LED. Drive the pin high to turn on the LED.
D7 / HWB This pin is connected to the bootloader jumper (HWB). The jumper is
connected to ground through a 240 ohm resistor. The pin is sampled after
all reset sources, including power-up. If the pin is low (HWB jumper
installed), then the bootloader is run. If the pin is high (HWB jumper
removed), then the user application is run. This pin functions as a normal
GPIO pin at all other times. The 240 ohm resistor provides short-circuit
protection in case the pin is used as an output and the jumper is installed.
RST Connects to reset pin of microcontroller as well as the reset button. A 10K
pullup resistor and 100nF capacitor are connected to this pin. If jumper J1
is set to ISP In, then RST is also connected to pin 5 of the ISP header.
B0 - B6 GPIO pins (Port B) Consult datasheet for functionality.
B7 PWM filter C output (OC.1C) or pin B7, depending on jumper
configuration.
C4, C7 GPIO pins (Port C) Consult datasheet for functionality.
C5 PWM filter B output (OC.1B) or pin C5, depending on jumper
configuration.
C6 PWM filter A output (OC.1A) or pin C6, depending on jumper
configuration.
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MT-DB-U1 Manual
D+, D- USB data pins. Can be used for panel-mount connectors.
PWM Filters
There are three PWM filters, which can be used to smooth out a PWM square wave
into an analog voltage (with some ripple). The outputs of these filters can be connected to
header pins C6, C5, and B7 using solder jumpers J4, J5, and J3 respectively (factory default).
The filters consist of a 1K resistor and 100nF capacitor. The cutoff frequency is:
f3db=1/2RC=1/21K∗100nF=1/20.0001=1600Hz
This is a first-order low-pass filter that can output levels from 0V to Vcc. All three filter
inputs are connected to the 16-bit timer 1 output compare pins (OC.1A, OC.1B, and OC.1C).
The filter inputs are always connected to the microcontroller. Therefore, if the solder jumpers
are configured to connect the microcontroller pins directly to the header pins, there will be
some loading on the pin (1K resistor in series with a 100nF capacitor to ground).
Clock Source
By default, a 16 MHz crystal is installed and connected to the XTAL pins of the
AT90usb162. This 16 Mhz clock must be divided by 2 in software if the Vcc voltage is less
than 4.5V. If an external clock is is used, solder jumper J6 can be switched to connect the
microcontroller pin directly to header pin rather than the onboard crystal. An external clock
signal can then be applied to pin X1 (XTAL1). This will also free up microcontroller pin C0
(XTAL2), which can be configured in the microcontroller as a GPIO pin and routed to header
pin X2 by switching solder jumper J7.
HWB Jumper / RESET button / LED
The HWB Jumper is used to select either the bootloader or user application. The pin is
sampled after reset or power-up. Note that the hardware HWB function of the AT90usb162 is
disabled. That is, the HWBE fuse is disabled. The bootloader startup code is always run after reset or
power-up (BOOTRST fuse is set). The code samples the state of the HWB pin. If the pin is low, the
bootloader continues to run. If the pin is high, the user application is run. The green LED will pulse on
and off using a continuously changing PWM period when the DFU bootloader is running. If the
preinstalled demo program is running, it will be lit when USB is connected. Otherwise, the state of the
LED is controlled by the user application. The bootloader always runs at 8 MHz, which is compatible
with lower voltages.The user may set the cpu speed to 16MHz in software, if running at 5V.
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