View detail for Atmel AVR1932: XPLORE Hardware User's Guide

APPLICATION NOTE
Atmel AVR1932: XPLORE Hardware User’s Guide
8-bit Atmel Microcontrollers
Features
•
Atmel® ATxmega32A4(U)/D4 microcontroller
• Supports 44-VQFN Package and contains 44-TQFP Footprints
•
UART-to-USB Converter
• Communicating via PC terminal utilizing UART-to-USB emulation
•
•
In-System Programming (ISP) and Debugging via PDI
Analog (ADC) Inputs
• Light Sensor
• Temperature Sensor
•
Digital I/Os
• Four Selectable Input Switch Buttons
• Four Selectable Output LEDs
• Supports ATAVRSBPR1 Adapter Card via TWI
Introduction
The XPLORE evaluation kit/board is a well designed hardware platform to evaluate
the Atmel AVR® XMEGA® family of the microcontrollers for its best analog
performance.
This board also offers a large range of the features that enables the XMEGA users to
get started quickly using the XMEGA peripherals and to get an understanding of the
how to integrate the XMEGA family of the microcontrollers in their own designs.
Figure 1.
XPLORE evaluation board.
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Table of Contents
1. Related items ....................................................................................... 3 2. Limitations ............................................................................................ 3 3. General information ............................................................................. 3 3.1 Power supply..................................................................................................... 5 3.1.1 USB powered ...................................................................................... 5 3.1.2 Battery powered .................................................................................. 6 3.1.3 External supply powered..................................................................... 7 3.2 Power-on LED of XMEGA ................................................................................. 8 3.3 External reset of XMEGA .................................................................................. 9 3.4 Measuring the XMEGA power consumption ..................................................... 9 3.5 Programming and debugging of the XMEGA .................................................... 9 3.6 Communicating via UART-to-USB gateway .................................................... 12 4. Connectors ......................................................................................... 12 4.2 Programming headers ..................................................................................... 13 4.3 I/O expansion headers .................................................................................... 14 5. Miscellanueous I/O ............................................................................ 16 5.1 Selectable input witch buttons ......................................................................... 16 5.2 Selectable ouput LEDs .................................................................................... 16 5.3 Analog I/Os ..................................................................................................... 17 5.4 External 8MHz crystal clock ............................................................................ 18 5.5 Sensor adapter card........................................................................................ 18 5.6 External VREF connection .............................................................................. 20 6. Revision history .................................................................................. 21 6.1 Revision 1.0 .................................................................................................... 21 7. References ......................................................................................... 21 7.1 On-line reference documents .......................................................................... 21 7.2 Design software and communication device driver ......................................... 21 7.3 XPLORE evaluation board schematic ............................................................. 21 8. EVALUATION BOARD/KIT IMPORTANT NOTICE ........................... 23 Atmel AVR1932: XPLORE Hardware User’s Guide [APPLICATION NOTE]
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1.
Related items
To use this XPLORE evaluation kit/board, it requires basic familiarity with following skills and technologies. Go to
Chapter 7 References at the end of this document to learn more.
•
•
•
•
2.
C/C++ programming language for embedded system
Atmel Studio V6.0 or later version (Atmel IDE)
Atmel AVR JTAGICE mkII/3
PDI In-System Programming (ISP) and Debugging
Limitations
When applying the three AA batteries (3x1.5V) as power supply voltage source from the battery holder of the XPLORE
board, be aware of the following limitation due to the use of the selected Low Dropout Linear Regulator (LDO) that is
connected to the output of the battery holder. Refer to the Reference section [8] to learn more from the LDO regulator
from the device datasheet.
3.
•
When the board is powered up by three AA batteries, please be caution that it will be producing 4.5V (3x1.5V)
output in the batteries’ full charged brand new stage, but it can be dropped as low as 3V when completely
discharged. The battery stack can be operated at 2.5V and 1.8V setup of the output without any problem, but
the 3.3V setup of the output could lose regulation when batteries are only partially discharged (when battery
voltage is effectively 3.6V)
•
Most battery operated equipment might be using switching regulators for high efficiency and long battery life.
However, switching power supply noise could be a critical concern, so a linear regulator (LDO) is designed on
this board for better analog performance
General information
The XPLORE evaluation kit contains a XPLORE board (Revision 1.0), a 12-inch standard USB cable (USB Type A
connector on one end, and USB type B connector on the end of the cable), and ten different colors of the connection
jumper wires. The Sensor Adapter Card (Atmel ATAVRSBPR1) and the AVR JTAGICE mkII/3 programming/debugging
kit that are described in this document will not be included in this XPLORE evaluation kit.
This XPLORE evaluation kit is designed to have the best analog performance based on the careful selection of the onboard components such as Low Dropout Linear Regulator (LDO), the design of the on-board filter circuit for AVCC
(analog power supply) pin of the XMEGA device, and the well designed board layout that contains the shortest trace
paths that are connected to external crystal clock and power supply nets, and with more ground plane decoupling Via(s)
in order to achieve the best analog performance (low noise ripples) for the device.
Figure 3-1 and Figure 3-2 show the Top and bottom Overview of the major on-board components for the XPLORE
evaluation board.
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Figure 3-1. Top overview of XPLORE evaluation board.
Figure 3-2. Bottom overview of XPLORE evaluation board.
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Figure 3-3. Block diagram for the Atmel XMEGA Interface devices.
Figure 3-3 shows the block diagram of the XMEGA interface devices that are used with/within this XPLORE evaluation
board.
The ADC peripheral of the XMEGA device can be used with external light sensor (TEMT6000) and temperature sensor
(NCP18WF104J03RB) on this XPLORE evaluation board for analog design demonstration.
The Sensor Adapter Board, which is not included with this XPLORE evaluation board, can be plugged onto the H3 and
H1 I/O expansion headers of the board to allow the XMEGA microcontroller to access the pressure sensor device
through TWI interface for sensor design demonstration.
The UART of the XMEGA can be connected to FTDI device (FT232RL) and then connect through USB to the PC
terminal for input and output design demonstration using the Graphic User Interface (GUI) from the PC.
The on-board LEDs and Push-buttons can also be used for design input and output demonstration.
3.1
Power supply
The on-board power supply circuitry allows three power supply configurations:
•
•
•
3.1.1
from USB connector
from battery holder
from external power supply
USB powered
When used in a USB device bus powered applications, the XMEGA microcontroller can be powered through the USB’s
VBUS power supply line with a Linear Voltage Regulator (U3: LDO) to supply 1.8V, 2.5V or 3.3V on XPLORE
evaluation board.
To power up the XMEGA microcontroller through USB’s VBUS power line, a standard USB cable (included in the
XPLORE evaluation kit) should be connected from the USB port of the PC to the USB (J4) connector on XPLORE
board. The jumpers on JPL8, JPL9, H7 and JP2 headers should also be setup as shown in Figure 3-4. The details of
these jumper settings are described on Table 3-1.
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Figure 3-4. USB powered jumpers setting.
Note:
The last jumper column connection on H7 header is reserved for future use.
Table 3-1.
Jumper header name
USB powered jumper setting
Comment
JPL8 (3x1 Header) (1)
Set this jumper to the left for
connecting VBUS and LDO
This jumper setting is shown on Figure 3-4, which
selects the input of LDO regulator (U3) to be connected
from VBUS pin of USB connector (J4).
H7 (4x2 Header) (2)
Set this Jumper to select
3.3V/2.8V/1.5V for power pins of
the XMEGA
This jumper setting is shown on Figure 3-4, which
selects the 3.3V/2.8V/1.5V voltage divider setting from
the LDO regulator (U3).
JPL9 (3x1 Header) (3)
Set this jumper to connect
LDO_OUT and VCC
This jumper setting is shown on Figure 3-4, which
selects LDO_OUT pin of the LDO regulator to be
connected to VCC net of JP2 header.
JP2 (2x1 Header) (4)
Set this Jumper to the left for
connecting
VCC and U1_VCC
This jumper setting is shown on Figure 3-4. Unset JP2
jumper will disconnect power to VCC/AVCC pin of the
XMEGA device.
Notes:
3.1.2
VBUS powered jumpers setting.
1.
This 3x1 jumper header allows selection for input of the LDO regulator to be connected from VBUS pin of
USB connector (J4) or from Vbat (V+) of Battery Holder.
2.
This 4x2 jumper header allows selection of 3.3V, 2.5V or 1.8V from LDO’s external voltage divider for
supplying selectable voltage for power pins of the XMEGA microcontroller.
3.
This 3x1 jumper header allows selection for VCC net to be connected from LDO_OUT of the LDO (U3) or
from EXT_VCC (External Power Supply – J1).
4.
This 2x1 jumper header will connect VCC net from JPL9 header to VCC/AVCC pins of XMEGA through
U1_VCC/U1_VCC_IN net.
Battery powered
The battery holder, if filled with three brand new AA (3x1.5V) batteries that are fully charged, can also be used as power
supply source for XMEGA micron roller on the XPLORE board.
To power up the XMEGA microcontroller through Battery Power Supply (Vbat), three AA (3x1.5V) batteries should be
inserted to the battery holder, which is located at the back of the XPLORE evaluation board. The jumpers on JPL8,
JPL9, H7 and JP2 headers should be setup as shown in Figure 3-5. The details of these jumper settings are described
on Table 3-2.
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Figure 3-5. Battery powered jumpers setting.
Table 3-2.
Battery powered jumpers setting.
Jumper header name
USB powered jumper setting
Comment
JPL8 (3x1 Header) (1)
Set this jumper to the right for
connecting Vbat and LDO
This jumper setting is shown on Figure 3-5, which
selects the input of the LDO regulator (U3) to be
connected from Vbat (V+) of the battery holder (Vbat1).
H7 (4x2 Header) (3)
Set this Jumper to select
3.3V/2.8V/1.5V for power pins of
the XMEGA
This jumper setting is shown on Figure 3-5, which
selects the 3.3V/2.8V/1.5V voltage divider setting from
the LDO (U3) regulator.
JPL9 (3x1 Header) (2)
Set jumper to the left for connecting
LDO_OUT and VCC
This jumper setting is shown on Figure 3-5, which
selects LDO_OUT pin of the LDO (U3) regulator to be
connected to VCC net of JP2 header.
JP2 (2x1 Header) (4)
Set Jumper to connect
VCC and U1_VCC
This jumper setting is shown on Figure 3-5. Unset JP2
jumper will disconnect power to VCC/AVCC pin of the
XMEGA microcontroller.
Notes:
1.
This 3x1 jumper header allows selection for input of the LDO (U3) regulator to be connected from the
VBUS pin of the USB connector (J4) or the Vbat (V+) of battery holder.
2.
This 4x2 jumper header allows selection of 3.3V, 2.5V or 1.8V from LDO’s external voltage divider for
supplying selectable voltage for power pins of the XMEGA microcontroller.
3.
This 3x1 jumper header allows selection for VCC net to be connected from LDO_OUT of the LDO or from
EXT_VCC (External Power Supply – J1).
4.
This 2x1 jumper header will connect VCC net from JPL9 header to VCC/AVCC pins of XMEGA
microcontroller through U1_VCC/U1_VCC_IN net.
More details can be referenced from the XPLORE board schematic.
3.1.3
External supply powered
The external power supply (EXT_VCC = 1.8V to 3.6V with GND) can be applied to horizontal banana power supply
jacks (J1 and J2) of the XPLORE evaluation board as another power supply source for XMEGA microcontroller.
To power up the XMEGA through External power supply, the DC power supply between 1.8V to 3.6V should be
connected to the red color banana power supply jack (J1: EXT_VCC) and the GND supply should also be connected to
the black color banana power supply jack (J2: GND) of the XPLORE evaluation board.
The jumpers on JPL8, JPL9, H7 and JP2 headers should be setup as shown in Figure 3-6. The details of these jumper
settings are described on Table 3-3.
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Figure 3-6. External powered jumpers setting.
Table 3-3.
External powered jumpers setting.
Jumper header name
External powered jumper setting
Comment
Don’t Care unless USB’s VBUS
power supply line is also used for
the on-board FT232RL (U2) device
in the application. (VCC net
connects to the VCCIO input pin of
FT232RL device)
When External Power Supply (J1: EXT_VCC) is
applied. USB’s VBUS and Vbat (Battery) supply source
are not used as Power Supply for XMEGA
microcontroller.
Set this jumper to the right for
connecting
EXT_VCC and VCC
This jumper setting is shown on Figure 3-6, which
selects External Power Supply Source (J1: EXT_VCC)
of the red color banana jack to be connected to VCC
net of JP2 header.
H7 (4x2 Header) (3)
Don’t care
When External Power Supply (J1: EXT_VCC) is
applied. The USB’s VBUS and Vbat (Battery) supply
source are not used as Power Supply for XMEGA
microcontroller. The LDO (U3) with its voltage divider s
not used too.
JP2 (2x1 Header) (4)
Set this Jumper to connect
VCC and U1_VCC
This jumper setting is shown on Figure 3-6. Unset JP2
jumper will disconnect power to VCC/AVCC pin of the
XMEGA microcontroller.
JPL8 (3x1 Header)
(1)
JPL9 (3x1 Header)
(2)
Notes:
1.
This 3x1 jumper header allows selection for input of the LDO (U3) regulator to be connected from VBUS
pin of USB connector or from Vbat (V+) of Battery Holder.
2.
This 3x1 jumper header allows selection for VCC net to be connected from LDO_OUT of the LDO (U3) or
from EXT_VCC (External Power Supply – J1).
3.
This 4x2 jumper header allows selection of 3.3V, 2.5V or 1.8V from LDO’s external voltage divider for
supplying selectable voltage for power pins of the XMEGA microcontroller.
4.
This 2x1 jumper header will connect VCC net from JPL9 header to VCC/AVCC pins of XMEGA
microcontroller through U1_VCC/U1_VCC_IN net.
More details can be referenced from the XPLORE board schematic.
3.2
Power-on LED of XMEGA
The power-on green LED (LED8) is mounted near the USB connector (J4). This is the power-on indicator of the Atmel
XMEGA microcontroller. The power source of LED8 is connected to U1_VCC_IN power supply voltage that shares with
VCC/AVCC pins of the XMEGA on the XPLORE evaluation board. This green LED will turn be turned on when power is
applied to the XMEGA.
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Note:
3.3
When setting up to power up the XMEGA at 1.8V, the power-on LED will not be light up as bright as powering up at
3.3V or 2.5V.
External reset of XMEGA
The reset switch button (SW8) is connected from circuit ground (GND) to active low reset pin (RESET_N) of the
XMEGA microcontroller with external 4.7kOhm pull-up resistor. This fixed configuration allows user to reset the XMEGA
by pressing the SW8 push button from the XPLORE evaluation board.
3.4
Measuring the XMEGA power consumption
The XMEGA microcontroller on the XPLORE evaluation board can be setup with the removal of the JP2 jumper to
measure its power consumption. The two-pin (2x1) header with a jumper mounted on it is the only connection that
supplies power source VCC net to the U1_VCC/U1_VCC_IN net, which provides power source to AVCC/VCC pins of
the XMEGA. By replacing the jumper with an ampere meter, it is possible to determine the current consumption of the
XMEGA.
To locate the power measurement header (JP2), please refer to Figure 3-4, Figure 3-5 or Figure 3-6.
3.5
Programming and debugging of the XMEGA
The XMEGA microcontroller can be programmed and debugged through the PDI In-System -Programming (ISP) header
(H6) on the XPLORE evaluation board. This can be accomplished using the programming tool such Atmel AVR
JTAGICE mkII/3 with Atmel AVR Studio® software. Figure 3-7 shows the simple PDI ISP connection setup from the
AVR JTAGICE mkII with its adapter board. Figure 3-8, Figure 3-9 and Figure 3-10 also shows other optional
programming or debugging connections. Reference the ISP header section of this document and the XPLORE Getting
Started Guide for more details.
Figure 3-7. Connection diagram for PDI ISP programming and debugging using JTAG ICE mkll with its programming
adapter and wires.
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Note:
Power supply source of the XMEGA microcontroller can also be provided from external DC power supply or battery
supply. Figure 3-7 only shows an example to powering up the XMEGA from USB Bus line for PDI ISP. Reference to
External supply powered section or Battery powered section of the document if you need to power up the device in
a different way.
Figure 3-8. Connection diagram for PDI programming/debugging using the Atmel AVR JTAGICE mkll with its PDI
connector.
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Figure 3-9. Connection diagram for PDI programming/debugging using the Atmel AVR JTAGICE 3 with its PDI
connector.
Figure 3-10. Connection for PDI programming/debugging using the Atmel AVR JTAGICE 3 with its programming
wires.
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3.6
Communicating via UART-to-USB gateway
The XMEGA microcontroller’s UART port connection on XPLORE board can setup with JP0 and JP1 jumpers to be
connected to UART port pins of the FT232RL (U2) device as shown in Figure 3-11.
The FT232RL’s internal UART can be configured to communicate at 9600 baud, using one start bit, eight data bits, one
stop bit, and no parity.
When the FT232RL is connected to a PC via USB bus line, the data transmitted from the XMEGA will be passed on to a
Virtual COM port (For example. COM11,…etc). This means that it is possible to use a terminal program such as Hyper
Terminal to receive the transmitted data from a desktop PC.
Similarly, data transmitted from the PC’s COM port can be passed on to the XMEGA’s UART port pins through the
same USB emulation gateway. For details, reference the XPLORE Getting Started Guide. The FT2232RL’s Virtual
COM port driver download information is shown in the References section of this document.
Figure 3-11. Set JP0 and JP1 jumpers for UART transmission.
Note:
Figure 3-11 shows the required jumpers setting to connect XMEGA to FT232RL device through UART
communication.
To setup a loop back UART connection for the XMEGA only, JP0 and JP2 jumpers can also be removed and then
connect a wire from (left side of the JP0) PD3 (U1’s TX0 from PORT D) to (left side of JP1) PD3 (U1’s RX0 from PORT
D).
4.
Connectors
The XPLORE evaluation kit board contains three 10-pin (5x2, 100mill) headers, two 6-pins headers, and one 9-pin (9x1,
100mill) header. One of these 6-pin headers (H6) is used for PDI ISP programming. Other headers (H1, H2, H3, H4 and
H5) are used as I/O expansion headers to access spare analog and digital pins from the XMEGA microcontroller.
The pin 1 position for H1, H3, H4 and H5 headers is always located at the upper left corner of the header with small
square area as shown on Figure 4-1. Similarly, the Pin 1 position of H2 header is the 1st pin with small square area as
shown in Figure 4-1.
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Figure 4-1. Header position diagram.
4.2
Programming headers
The XMEGA microcontroller can be programmed and debugged by connecting an external programming/debugging tool
like Atmel AVR JTAGICE mkII/3 to the ISP header (H6) on the XPLORE evaluation board. The JTAGICE mkII with its
adapter board can be connected with its four different color wires (Red color wire = PDI_DATA, Purple color wire =
VTG/VCC(U1_VCC_IN net), Green color wire = PDI_CLK, and White color wire = GND) to the PDI ISP header (H6:
Pin 1 = PDI_DATA, Pin 2 = VTG (U1_VCC_IN), Pin 5 = PDI_CLK, and Pin 6 = GND) on the Xplore evaluation kit board
as show in Figure 3-7, Figure 3-8, Figure 3-9 and Figure 3-10. For other programming/debugging connections, please
reference the programmer/debugger’s user’s guide. Figure 3-8, Figure 3-9 and Figure 3-10 also provides some simple
programming/debugging connections for the XMEGA on the XPLORE board.
Table 4-1 shows the pin-out and programming/Debugging connection for H6 header and the programming wire
connections from the AVR JTAGICE mkII.
Table 4-1.
Notes:
Pin-out and connection for H6 (PDI ISP) header.
H6 (3x2) header number
XMEGA PDI Pins
Wire color from adapter
1
PDI_DATA
Red color wire
2
VCC (VTG – U1_VCC_IN)
Purple color wire
(1)
3
NC
4
NC (1)
5
PDI_CLK
Green color wire
6
GND
White color wire
1.
NC means Not Connect.
2.
Pin 1 of the H6: PDI ISP header is located at the upper left hand corner on Figure 3-11.
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4.3
I/O expansion headers
The XMEGA microcontroller’s analog (ADC) Port A is available on the “XMEGA PORT A” pin header (H1). This allows
the user to connect external signals to the internal ADC, Analog Comparators on PORT A of the XMEGA. The Port A of
the XMEGA also offers AREF pin feature.
For more details about the device pin feature of the XMEGA, reference to the device datasheet.
Table 4-2 shows the details about the H1 header on XPLORE board.
Table 4-2.
Pin-out and connection for H1 header.
H1 (5x2) header pin number
Header pin number
Description of pin connection
1
PA0/ADC0/AREF
Connected to Port A’s pin #0 or ADC0/AREF pin of XMEGA
2
PA1/ADC1
Connected to Port A’s pin #1 or ADC1 pin of XMEGA
3
PA2/ADC2
Connected to Port A’s pin #2 or ADC2 pin of XMEGA
4
PA3/ADC3
Connected to Port A’s pin #3 or ADC3 pin of XMEGA
5
PA4/ADC4
Connected to Port A’s pin #4 or ADC4 pin of XMEGA
6
PA5/ADC5
Connected to Port A’s pin #5 or ADC5 pin of XMEGA
5
PA6/ADC6
Connected to Port A’s pin #6 or ADC6 pin of XMEGA
6
PA7/ADC7
Connected to Port A’s pin #7 or ADC7 pin of XMEGA
7
GND
Connected to Ground Plane via decoupling Capacitors
8
VCC
Connected to VCC net of JPL9 header
The XMEGA microcontroller’s digital Port B is available on the “XMEGA PORT B” pin header (H2). This header also
contains GND pins adjacent to each PORT B pins of the XMEGA. The Port B pins can also used for ADC peripheral of
the XMEGA.
For more details about the device pin feature of XMEGA, reference to the device datasheet.
Table 4-3 shows the details about the H2 header on Xplore board.
Table 4-3.
Pin-out and connection for H2 header.
H2 (9x1) header pin number
Header pin name
Description of pin connection
1
GND
Connected to Ground Plane
2
PB0/AREF/ADC8
Connected to Port B’s pin #0 or AREF pin of XMEGA
3
GND
Connected to Ground Plane
4
PB1/ADC9
Connected to Port B’s pin #1 or ADC9 pin of XMEGA
5
GND
Connected to Ground Plane
6
PB2/ADC10
Connected to Port B’s pin #2 or ADC10 of XMEGA
7
GND
Connected to Ground Plane
8
PB3/ADC11
Connected to Port B’s pin #3 or ADC11 of XMEGA
9
GND
Connected to Ground Plane
The XMEGA microcontroller’s digital PORT C is available on the “PORT C” pin header (H3). This port features general
purpose I/O and various communication modules (TWIC, SPI, USARTC0, USARTC1, TCC1…etc).
For more details about the device pin feature of XMEGA, reference to the device datasheet
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Table 4-4 shows the details about the H3 header on XPLORE evaluation board.
Table 4-4.
Pin-out and connection for H3 header.
H3 (5x2) header pin number
Header pin name
Description of pin connection
1
PC0/SDA
Connected to Port C’s pin #0 or TWIC’s SDA pin of XMEGA
2
PC1/SCL
Connected to Port C’s pin #1 or TWIC’s SCL pin of XMEGA
3
PC2
Connected to Port C’s pin #2 of XMEGA
4
PC3
Connected to Port C’s pin #3 of XMEGA
5
PC4
Connected to Port C’s pin #4 of XMEGA
6
PC5
Connected to Port C’s pin #5 of XMEGA
5
PC6
Connected to Port C’s pin #6 of XMEGA
6
PC7
Connected to Port C’s pin #7 of XMEGA
7
GND
Connected to Ground Plane via decoupling Capacitors
8
VCC
Connected to VCC net of JPL9 header
The XMEGA microcontroller’s another digital PORT D is available on the “PORT D” pin header (H4). This port features
general purpose I/O and various communication modules (USARTD0, USARTD1, SPI0…etc).
For more details about the device pin feature of XMEGA, reference to the device datasheet.
Table 4-5 shows the details about the H3 header on XPLORE evaluation board.
Table 4-5.
Pin-out and connection for H4 header.
H4 (5×2) header pin number
Header pin number
Description of pin connection
1
PD0
Connected to Port D’s pin #0 of XMEGA
2
PD1
Connected to Port D’s pin #1 of XMEGA
3
PD2/RXD0
Connected to Port D’s pin #2 or RXD0 of USARTD0 of XMEGA
4
PD3/TXD0
Connected to Port D’s pin #3 or TXD0 of USARTD0 of XMEGA
5
PD4
Connected to Port D’s pin #4 of XMEGA
6
PD5
Connected to Port D’s pin #5 of XMEGA
5
PD6
Connected to Port D’s pin #6 of XMEGA
6
PD7
Connected to Port D’s pin #7 of XMEGA
7
GND
Connected to Ground Plane via decoupling Capacitors
8
VCC
Connected to VCC net of JPL9 header
The XMEGA microcontroller’s another digital PORT E is available on the “PORT E” pin header (H5). This port features
general purpose I/O and various communication modules (TWIE, USARTE0…etc).
For more details about the device pin feature of XMEGA, reference to the device datasheet.
Table 4-6 shows the details about the H5 header on XPLORE evaluation board.
Atmel AVR1932: XPLORE Hardware User’s Guide [APPLICATION NOTE]
42014A−AVR−07/12
15
Table 4-6.
Pin-out connection for H5 header.
H5 (3x2) header pin number
Header pin name
Description of pin connection
1
PE0
Connected to Port E’s pin #0 of XMEGA
2
PE1
Connected to Port E’s pin #1 of XMEGA
3
PE2
Connected to Port E’s pin #2 of XMEGA
4
PE3
Connected to Port E’s pin #3 of XMEGA
5
GND
Connected to Ground Plane via decoupling Capacitors
6
VCC
Connected to VCC net of JPL9 header
5.
Miscellanueous I/O
5.1
Selectable input witch buttons
The XPLORE evaluation board is equipped with four selectable micro switch buttons. The I/O connections from Port E
(PE0, PE1, PE2 and PE3) of the XMEGA microcontroller can be connected to each of these four push buttons (SW0,
SW1, SW2 and SW3) by setting up the four jumpers from JPL0, JPL1, JPL2 and JPL3 headers as showed on the Table
5-1. User can also setup jumper wires from any other I/O port headers (Port A, Port B, Port C or Port D) to these four
micro switch buttons to use them as input signals.
To be able to detect a button press, the firmware has to periodically set the I/O pin to input with internal pull-up and
check if it is low. When done fast enough, the human eye will not see any change on the LEDs.
Table 5-1.
Note:
5.2
Switch buttons connection to Port E pins on JPL0/1/2/3 headers.
JPLx (3x1) header name
Jumper settings for switch buttons
Description of Jumper Settings
JPL0
Set jumper to the right of JPL0
Connected pin #0 of Port E of XMEGA to Input
Switch Button SW0
JPL1
Set jumper to the right of JPL1
Connected pin #1 of Port E of XMEGA to Input
Switch Button SW1
JPL2
Set jumper to the right of JPL2
Connected pin #2 of Port E of XMEGA to Input
Switch Button SW2
JPL3
Set jumper to the right of JPL3
Connected pin #3 of Port E of XMEGA to Input
Switch Button SW3
JPL0 is shown in Figure 3-1, JPL1 is located next to JPL0, and JPL2 is located next JPL1, and JPL3 is located next
to JPL2. This is similar for location of the Switch buttons (SW0, SW1, SW3 and SW3).
Selectable ouput LEDs
The XPLORE board has four selectable standard yellow LEDs. The I/O connections from Port E (PE0, PE1, PE2 and
PE3) of the XMEGA device can be connected to each of these four LEDs (LED0, LED1, LED2 and LED3) by setting up
the four jumpers from JPL0, JPL1, JPL2 and JPL3 headers as showed on the Table 5-2. User can also setup jumper
wires from any other I/O port headers (Port A, Port B, Port C or Port D) to these four output LEDs to use them as output
display signals.
When turning any of these LEDs on, set the I/O pin to output low. When turning the LED off, set the I/O pin to output
high, or configure it as input with pull-up.
Atmel AVR1932: XPLORE Hardware User’s Guide [APPLICATION NOTE]
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Table 5-2.
Note:
5.3
LEDs connection to Port E pins on JPL0/1/2/3 headers.
JPLx (3x1) headers name
Jumper settings for LEDs
Description of jumper settings
JPL0
Set Jumper to the left of JPL0 header
Connected Port E[0] pin of XMEGA to output
LED0
JPL1
Set Jumper to the left of JPL1 header
Connected Port E[1] pin of XMEGA to output
LED1
JPL2
Set Jumper to the left of JPL2 header
Connected Port E[2] pin of XMEGA to output
LED2
JPL3
Set Jumper to the left of JPL3 header
Connected Port E[3] pin of XMEGA to output
LED3
JPL0 is shown in Figure 3-1, JPL1 is located next to JPL0, and JPL2 is located next JPL1, and JPL3 is located next
to JPL2. This is similar for location of the Switch buttons (LED0, LED1, LED2 and LED3).
Analog I/Os
The light sensor (TEMT6000) and the Temperature Sensor (NCP18WF104J03RB) with voltage divider circuit are
connected to XMEGA’s ADC2 and ADC3 pins as showed in Figure 5-1.
These on-board sensor components with analog circuit can be used as input analog sources for the ADC of the XMEGA
by setting up JP5, JP6 and JP7 jumpers. External reference voltage supply from Vref of the Banana power supply jack
can also be connected to PA0/Vref or PB0/Vref of the XMEGA device through JP3 and JP4 jumper headers
respectively.
Figure 5-2 shows the required jumpers to be setup in order to use these external sensors as input analog sources for
the ADC of the XMEGA microcontroller.
Table 5-3 also shows the details of these jumper settings.
Figure 5-1. Light sensor and temperature sensor connection on XPLORE board.
Atmel AVR1932: XPLORE Hardware User’s Guide [APPLICATION NOTE]
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Figure 5-2. JP5, JP6 and JP7 jumper settings.
Table 5-3.
J5, J6 and J7 jumpers setting description.
Jumper header name (2x1)
Jumper setting
Comment
JP5
ADC_L(DS1) and ADC3 (U1)
Set JP5 jumper will connect ADC2 pin of
XMEGA (U1) to ADC_L of the Light
Sensor(DS1)
JP6
ADC_T(RT1) and ADC4 (U1)
Set JP6 jumper will connect ADC3 pin of
XMEGA (U1) to ADC_T of the Temperature
Sensor (RT1)
VCC (JPL8) and VCC_Sensors
Set JP7 jumper will connect VCC net from JPL8
header to VCC_Sensors (Power Supply pin of
Temperature Sensor (DS1) and Light Sensor
(RT1)
JP7
5.4
External 8MHz crystal clock
The XPLORE evaluation board contains an external 8MHz (Y1) Crystal with a pair of decoupling capacitors that are
connected to Ground Plane. This allows XMEGA design to use an external crystal clock as a possible design clock
option. This external crystal clock actually connected one end to the XTAL1 (PR1) pin, and another end connected to
XTAL2 (PR0) pins of the XMEGA (U1). The position of the Y1 crystal is located very close to the device pin of the
XMEGA microcontroller as shown on Figure 3-1.
5.5
Sensor adapter card
The XPLORE evaluation board contains I/O Port A header (H1) and Port C (H3) header for the XMEGA microcontroller
with well designed header-to-header distance that will allow user to plug-in a sensor adapter card such as
“ATAVRSBPR1” – Pressure One as shown in Figure 5-3.
The I/O Port C header actually contains TWI (Two-wire Interface) pins from TWIC of the XMEGA, which allows TWI
access to the pressure sensor from the ATAVRSBPR1 sensor adapter card. The I/O header definition for H1: Port A
header and H3: Port C header can be found from Table 5-4.
The pin 1 position of all the I/O port headers of the XMEGA on XPLORE evaluation board is located at the upper right
hand corner with small square area as shown in Figure 4-1, so the external adapter card should be connected as shown
in Figure 5-3 with the Atmel Logo of the adapter board facing in the opposite direct comparing to the Atmel Logo that is
located on the XPLORE evaluation board.
Atmel AVR1932: XPLORE Hardware User’s Guide [APPLICATION NOTE]
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18
Figure 5-3. Sensor adapter card plug-in position diagram.
Table 5-4.
Note:
Sensor adapter card connection on XPLORE evaluation board.
H3 (3x1) header number
Sensor adapter board signal name
Description of the pin connection
1
SDA
Connects TWIC’s SDA pin of XMEGA (via H3
header) to SDA pin of BMP085 on sensor
adapter board
2
SCL
Connects TWIC’s SCL pin of XMEGA (via H3
header) to SCL pin of BMP085 on sensor
adapter board
3
CLR (XCLR)
Connects from PC2 pin of XMEGA (via H3
header) to XCLR pin of BMP085 on Sensor
Adapter Card
4
EDC (EDC)
Connects from PC3 pin of XMEGA (via H3
Header) to EDC pin of BMP085 in Sensor
Adapter Card
5
NC
No Connect
6
NC
No Connect
7
NC
No Connect
8
NC
No Connect
9
GND
Connects from Ground Plane of XPLORE board
to Ground connection of the Sensor Adapter
Card
10
VCC (PWR)
Connects to Power Supply pin of the Sensor
Adapter Card
Since the other header on the sensor adapter board is not connected (NC pins), there will not be any signal
connection from H1 header of the XPLORE board to the Sensor Adapter Card. References [9] for details about the
details of the header connection for the Sensor Adapter Card.
Atmel AVR1932: XPLORE Hardware User’s Guide [APPLICATION NOTE]
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5.6
External VREF connection
The XPLORE evaluation board contains a red banana power supply jack (J3), which is used for supplying reference
voltage (VREF) from External DC power supply to VREF pins (PA0/VREF (U1_PA0) or PB0/VREF (U1_PB0)) of the
XMEGA microcontroller. If the internal reference voltage is not used for the ADC, external reference voltage can be
used by setting JP3 and JP4 jumpers from XPLORE evaluation board, and with J3 (Red Banana power supply Jack)
supplied with voltage from the DC power supply and J2 (Black banana power supply Jack) also supplied from GND of
the DC power supply.
Figure 5-4 and Figure 5-5 show the VREF jumper settings on JP3 and JP4 (2x1) headers respectively.
Figure 5-4. JP3 jumper setting.
Figure 5-5. JP4 jumper setting.
Atmel AVR1932: XPLORE Hardware User’s Guide [APPLICATION NOTE]
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Table 5-5.
J3 and J4 jumpers setting description.
Jumper header name (2x1)
Jumper setting
Comment
JP3
PA0 (U1_PA0) and VREF (J3_VREF)
Set JP3 jumper will connect PA0/Vref pin of
XMEGA (U1) to VREF of the J3 (The Vref - Red
banana power supply Jack)
JP4
PB0 (U1_PB0) and VREF (J3_VREF)
Set JP3 jumper will connect PA0/Vref pin of
nd
XMEGA (U1) to VREF of the J3 (The 2 Red
banana power supply Jack)
6.
Revision history
6.1
Revision 1.0
The Atmel Xplore Evaluation Kit board, revision 1.0, is the first released revision of the board.
7.
References
7.1
On-line reference documents
[1]
[2]
[3]
[4]
[5]
[6]
[7]
ATXMEGA32A4U device datasheet: http://www.atmel.com/Images/doc8387.pdf
ATXMEGA32A4 device datasheet: http://www.atmel.com/dyn/resources/prod_documents/doc8069.pdf
ATXMEGA32D4 device datasheet: http://www.atmel.com/Images/doc8135.pdf
Atmel ATXMEGA AU device Manual: http://www.atmel.com/Images/doc8331.pdf
Atmel ATXMEGA A device Manual: http://www.atmel.com/dyn/resources/prod_documents/doc8077.pdf
Atmel ATXMEGA D device Manual: http://www.atmel.com/Images/doc8210.pdf
FTDI (Future Technology International Ltd. FT2232RL)
Datasheet: http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT232R.pdf
[8] LDO (Linear Technology LT3022) Datasheet: http://www.linear.com/product/LT3022
[9] Atmel AVR4201: Pressure One (Atmel ATAVRSBPR1) Hardware Users
Guide: http://www.atmel.com/dyn/resources/prod_documents/doc8355.pdf
7.2
Design software and communication device driver
[10] Atmel Studio Software Download: http://www.atmel.com/tools/atmelstudio.aspx
[11] FTDI (FT2232) Virtual COM Port Driver (used for USB connection to PC)
Download: http://www.ftdichip.com/Drivers/VCP.htm
7.3
XPLORE evaluation board schematic
The XPLORE Evaluation Board Schematic is shown in Figure 7-1.
Atmel AVR1932: XPLORE Hardware User’s Guide [APPLICATION NOTE]
42014A−AVR−07/12
21
Figure 7-1. XPLORE evaluation board schematic.
1
2
3
4
5
6
U2
TXD
H1
Label: PA0
Label: PA2
Label: PA4
Label: PA6
Label: GND
PA0
PA2
PA4
PA6
GND_H1
1
3
5
7
9
PA1
PA3
PA5
PA7
VCC
2
4
6
8
10
Label: PA1
Label: PA3
Label: PA5
Label: PA7
Label: VCC
Label: PDI_DATA
Label: NC
Label: PDI_CLK
H6
PDI_DATA
1
3
5
RESET_N_PDI_CLK
Label: U1_VCC_IN U1_VCC_IN Label: PE0
Label: PE2
Label: NC
C20
Label: GND
Label: GND GND_H6
0.1uF
2
4
6
HEADER 3X2
Label: ISP/PDI Header
HEADER 5X2
Label: PORT A
H5
PE0
PE2
GND_H5
1
3
5
3
VCC
C17
0.1 uF
HEADER 3X2
Label: PORT E
GND
2
Label: PE1
Label: PE3
Label: VCC
PE1
PE3
VCC
2
4
6
C15
0.1 uF
C6
100 nF
GND
RXD
GND
U1_VCC
HEADER 2x1
Label: U1_VCC
A
2
B
1
Connected PAD
R16
0 ohm
Do Not Populated
A
B
2
GND
10
Ferrite Bead
Connected Pad
R17
0 ohm
Do Not Populated
GND
B2
U1_VCC_IN
R18
0 ohm
Do Not Populated
C4
0.1uF
GND
11
C5
0.1uF
R21
10 K
4
1
GND
Y1
1
12
P23
0402 Pad
1
2
3
4
5
6
7
8
9
GND
C1
0.1uF
1
2
3
4
5
6
7
8
9
10
11
PA5
PA6
PA7
PB0
PB1
PB2
PB3
GND
PC0
PC1
HEADER 9x1
Label: PORT B
PA5
PA6
PA7
PB0
PB1
PB2
PB3
GND
VCC
PC0
PC1
C
PA4
PA3
PA2
PA1
PA0
AVCC
GND
PR1
PR0
*RESET/PDI_CLK
PDI
H2
GND
PB0
GND
PB1
GND
PB2
GND
PB3
GND
ATXMEGA32A4
QFN/TQFP 44
PC2
PC3
PC4
PC5
PC6
PC7
GND
VCC
PD0
PD1
PD2
Label: GND
Label: PB0
Label: GND
Label: PB1
Label: GND
Lable: PB2
Label: GND
Label: PB3
Label: GND
33
32
31
30
29
28
27
26
25
24
23
PE3
PE2
VCC
GND
PE1
PE0
PD7
PD6
PD5
PD4
PD3
1
C18
0.1uF
HEADER 5X2
Label: PORT C
TXD
28
OSCO
DTR#
27
OSCI
RTS#
26
TEST
VCCIO
25
AGND
FT232RL
RXD
24
NC
RI#
23
CBUS0
SSOP 28
GND
22
CBUS1
NC
GND
DSR#
VCC
DCD#
RESET#
CTS#
GND
20
VBUS_IN
C7
100 nF
19
C8
GND 4.7 uF
18
GND
*NRESET/PDI_CLK
CBUS4
D
21
GND
17
3V3OUT
CBUS2
USBDM
CBUS3
USBDP
16
DM
15
DP
C9
100 nF
FT232RL_SSOP_28
R9
4.7 K
Label: RESET
RESET_N_PDI_CLK
PE3
PE2
C14
GND
PE1
PE0
PD7
PD6
PD5
PD4
PD3
SW8
10 nF
C3
0.1uF
GND
Switch
SW8
GND
The 44 QFN is populated on board, but the 44 TQFP is not populated, but it should have layout of the PKG and pinouts
C
Label: VTG/VCC
Label: PD0
Label: PD2
Label: PD4
Label: PD6
Label: GND
H4
PD0
PD2
PD4
PD6
GND_H4
1
3
5
7
9
PD1
PD3
PD5
PD7
VCC
2
4
6
8
10
HEADER 5X2
Label: PORT D
PD0
PD1
PD2
Label: PC1
Label: PC3
Label: PC5
Label: PC7
Label: VCC
PC1
PC3
PC5
PC7
VCC
2
4
6
8
10
PC2
PC3
PC4
PC5
PC6
PC7
GND
1
3
5
7
9
14
C12
15 pF
CRYSTAL
Connected Pad
Label: SMD 8MHz Crystal
Part#: FQ7050B
12
13
14
15
16
17
18
19
20
21
22
H3
PC0
PC2
PC4
PC6
GND_H3
13
U1_VCC_IN
2
2
ATXMEGA32A4_44QFN/TQFP
Label: PC0
Label: PC2
Label: PC4
Label: PC6
Label: GND
12
Reserve pad, Do not populate R21
44
43
42
41
40
39
38
37
36
35
34
C13
15 pF
U1
U4
7
9
Part #: MI0805K400R-10
3
1
2
P22
0805 PAD
PA4
PA3
PA2
PA1
PA0
AVCC
GND
PR1
PR0
RESET_N_PDI_CLK
PDI_DATA
P21
0805 PAD
5
8
GND
Label: VCC VCC
JP2
4
6
GND
D
1
Label: PD1
Label: PD3
Label: PD5
Label: PD7
Label: VCC
C19
0.1 uF
GND
GND
C2
0.1uF
2
DM
JP1
Label: U2_RXD
Label: U1_PD3_TXD0
DP
GND_USB
USB_DEVICE_PORT_B_TYPE
1
2
LED2
LED3
HSMY-C190
HSMY-C190
HSMY-C190
Yellow
Yellow
Yellow
Yellow
R1
150
R2
150
R3
150
DS1/RT1
Tempurature and Light Sensor Circuit
VCC_Sensors
R4
150
C21
10000 pF
Shield Ground
DS1
TEMT600
Light Sensor
R20
100 K
JP7
1
2
3
GND
JPL9
Label: LDO_OUT
1
Label: VCC
2
Label: EXT_VCC
3
LED8
JPL2
SW0
Switch
GND
SW1
Switch
GND
SW2
Switch
GND
SW3
Label: PA0
A
B
R19
200 K
2x1 Header
VCC
ADC_L
t
GND
Label: ADC_ Light
PA2
Lable: PA2
GND
RT1
NCP18WF104J03RB
Temperature Sensor
ADC_T
JP5
Label; ADC_Temp
PA3
Labe: PA3
2x1 Header
JP6
1
2
1
2
2x1 Header
Switch
GND
HEADER 3x1
Label: J3_VREF
JPL3
1
2
R10
150
GND
VREF
JPL1
LED3
Label: LED3
PE0
Lable: PE0
SW0
HSMG-C190
Green
J3
PWR: VREF
105-0752-001 Label: PWR: Scaled VREF
Horizontal Test Jack - Red Color
GND
1
LDO_OUT
VCC
2
1
Regular Battery Holder
Part #: BH3AAPC
3xAA = 3x 1.5V = 4.5V
R15
200
LED2
Label: LED2
1
1
1
1
PE1
PE2
PE3
2
2
2
2
Label: PE1
Label: PE2
Label: PE3
3
3
3
3
SW1
SW2
SW3
3x1 Header
3x1 Header
3x1 Header
3x1 Header
Label: SW0
Label: SW1
Label: SW2
Label: SW3
Label: L8 Power-On-LED
J2
PWR: GND
105-0753-001 Label: PWR: GND
Horizontal Test Jack - Back Color
This H7 header only allows to use one jumper at a time
LED1
Label: LED1
JPL0
EXT_VCC
1
GND GND
Label: VCC
LED0
Label: LED0
HEADER 3x1
17
GND
Labe: VCC_Sensors
J1
VCC
PWR: VCC=1.8V to 3.6V
105-0752-001
Label: PWR: VCC = 1.8V to 3.6V
Horizontal Test Jack - Red Color
JPL8
Label:VBUS
Label: LDO
Vbat Label: Vbat
Bottom Exposed Pad
2
4
6
8
1
3
5
7
HEADER 4X2
H7
RXD
PD3
LED1
HSMY-C190
HEADER 2x1
U3
LDO
Part #: LT3022EDHC#PBF
LT3022
1
16
LDO
NC
NC
2
15
NC
NC
3
14
OUT
IN
4
13
OUT
IN
C10
5
12
ADJ
IN
10 uF
C11
6
11
AGND
PGND
10 uF
7
10
10V, x5R Ceramic Capacitor
AGND
PGND
8
9
NC
/SHDN
10V, x5R Ceramic Capacitor
Bat1
The Bottom Exposed Pad of U3 is Pin 17,
which must be connected to PCB GND
GND
Label: 3.3V
Label: 2.5V
Label: 1.8V
Label: Adjustable
R11
1K ohm
1
2
HEADER 2x1
B
R12 R13 R14
3.09K2.32 K
1.62 K
TXD
PD2
Part #: MI0805K400R-10
GND
3
4
D+
GND
Label: U2_TXD
Label: U1_PD2_RXD0
VBUS_IN
Ferrite Bead
2
SH1
5
B1
VBUS
C16
10 nF
D-
LED0
JP0
2
SH2
6
VCC
Shield Ground
J4
USB B-Type Device Port
1
VBUS
LOGO1
ATMEL_logo
ATMEL_LOGO
JP3
1
2
Atmel Corporation
2324 Orchard Parkway
San Jose, CA 95131
U.S.A.
LOGO2
AVR_logo
AVR_LOGO
Header 2x1
A
PA0
ATXMEGA32A4 Verification Board
JP4
Label: J3_VREF
Label: PB0
1
2
Size
C
Header 2x1
PB0
Scal e
1
2
3
4
5
FCSM No.
DWG No.
1
Rev
1.0
Sheet
1 of 1
6
Atmel AVR1932: XPLORE Hardware User’s Guide [APPLICATION NOTE]
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8.
EVALUATION BOARD/KIT IMPORTANT NOTICE
This evaluation board/kit is intended to use for FURTHER ENGINEERING, DEVELOPMENT, DEMONSTRATION,
EVALUATION, or TRAINING PURPOSES ONLY. It is not a finished product, and may not (yet) comply with some or
any technical or legal requirements that are applicable to finished products, including, without limitation, directives
regarding electromagnetic compatibility, recycling (WEEE), FCC, CE or UL (except as may be otherwise noted on the
board/kit). Atmel supplied this board/kit “AS IS,” without any warranties, with all faults, at the buyer’s and further users’
sole risk. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user
indemnifies Atmel from all claims arising from the handling or use of the goods. Due to the open construction of the
product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge
and any other technical or legal concerns.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER USER NOR ATMEL SHALL BE
LIABLE TO EACH OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
No license is granted under any patent right or other intellectual property right of Atmel covering or relating to any
machine, process, or combination in which such Atmel products or services might be or are used.
Mailing Address: Atmel Corporation, 2325 Orchard Parkway, San Jose, CA 95131
Atmel AVR1932: XPLORE Hardware User’s Guide [APPLICATION NOTE]
42014A−AVR−07/12
23
Atmel Corporation
Atmel Asia Limited
Atmel Munich GmbH
Atmel Japan G.K.
1600 Technology Drive
Unit 01-5 & 16, 19F
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