Build Your Own LaunchPadâ„¢ or LaucnchPad BoosterPack Development Tool

Build Your Own LaunchPadâ„¢ or LaucnchPad BoosterPack Development Tool
Design Guide
SLAA542 – December 2012
Build Your Own LaunchPad™ or
LaunchPad BoosterPack™ Development Tool
.....................................................................................................................................................
ABSTRACT
This standard defines the physical and electrical specifications of all TI MCU LaunchPad™ evaluation
platforms.
Follow these guidelines to maximize success when creating a LaunchPad that supports the BoosterPack
ecosystem. Alternatively, these guidelines can also maximize success when creating a BoosterPack that
can be plugged into the LaunchPad evaluation kits.
1
2
3
Contents
Introduction .................................................................................................................. 1
Electrical and Physical Specifications .................................................................................... 4
Useful Links and Resources ............................................................................................... 7
List of Figures
1
BoosterPack Docking ....................................................................................................... 3
2
BoosterPack Stacking ...................................................................................................... 3
3
20-Pin LaunchPad Standard
4
4
40-Pin LaunchPad Standard
5
5
..............................................................................................
..............................................................................................
80-Pin LaunchPad Standard ..............................................................................................
1
Introduction
1.1
Disclaimer
6
It is important to note that this standard ensures only physical and electrical compatibility between a
LaunchPad baseboard and a BoosterPack plugin module. This standard does not ensure full support in
terms of firmware availability, nor does it ensure that the embedded processor on the LaunchPad can
support the functions of a given BoosterPack. In addition, this document does not ensure compatibility
between BoosterPack kits or support for stacking of multiple BoosterPack kits. Review the specific
BoosterPack pinouts to determine support for stacking.
TI recommends that you use the smallest footprint that fits the requirements when creating a new
BoosterPack to ensure maximum reusability. For example, it is better to create a 20-pin BoosterPack
rather than a 40-pin BoosterPack if only 20 pins are needed. The inner 20 pins found in the 40-pin or 80pin LaunchPad variants can be made as pass through connectors so that 40-pin BoosterPacks can be
stacked on top.
LaunchPad is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
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1
Introduction
1.2
www.ti.com
Definitions
LaunchPad – A baseboard that is based on a TI embedded processor. LaunchPad evaluation kits can be
based on MSP430, C2000, Stellaris, or other embedded processors from Texas Instruments. LaunchPad
evaluation kits are available in different pin counts:
• 20 pins
• 40 pins
• 80 pins (future)
LaunchPad headers should be male and face up. All pins are placed at 100 mil (2.54 mm) spacing.
Required for LaunchPad kits:
• On-board emulation for programming, debugging, and serial communication to PC
• Reset button
• General-purpose buttons and LEDs
BoosterPack – A plugin module that fits on top of a LaunchPad evaluation kit. BoosterPack kits are
available in different pin counts:
• 20 pins
• 40 pins
• 80 pins (future)
BoosterPack headers should be female and face down. To enable BoosterPack stacking, stackable
headers can be used, which provide downward facing female headers and upward facing male headers.
To ensure proper stacking of several BoosterPack kits, pay special attention to the pin assignments of
each BoosterPack.
Stackable Headers – Headers that enable multiple plug-in modules or BoosterPacks to stack on top of
each other. If you are interested in making your BoosterPack stackable, the part number below can be
used.
Part Number: Samtec SSW-110-23-S-D
Other sources:
www.4uconnector.com (Part number: 19950)
Also available from 453oh.com
1.3
BoosterPack Design Guide
To supplement this standard, a BoosterPack Design Guide is available at
http://processors.wiki.ti.com/index.php/BoosterPack_Design_Guide.
The BoosterPack Design Guide is a resource to help BoosterPack developers see the various pinouts on
the available LaunchPad kits. This information, in addition to this BoosterPack standard, gives developers
the information needed to design a new BoosterPack that is compatible with the available LaunchPad
evaluation kits.
1.4
BoosterPack Combinations
If this standard is followed, several different combinations of BoosterPack kits can be added to an
accompanying LaunchPad board. Different BoosterPack kits can be plugged into separate "docks" in the
case of the 80-pin LaunchPad. In addition, BoosterPack kits can be stacked vertically. This allows
BoosterPack kits to share common pins and is especially useful when creating an SPI or I2C bus.
Figure 1 and Figure 2 show examples of how BoosterPack kits can be plugged into a LaunchPad. Note
that a 20-pin BoosterPack can also stack on a 40-pin LaunchPad.
2
Build Your Own LaunchPad™ or LaunchPad BoosterPack™ Development
Tool
Copyright © 2012, Texas Instruments Incorporated
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Introduction
www.ti.com
Figure 1. BoosterPack Docking
Figure 2. BoosterPack Stacking
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3
Electrical and Physical Specifications
www.ti.com
2
Electrical and Physical Specifications
2.1
20-Pin LaunchPad and BoosterPack Standard
Figure 3 shows the pinout and dimensions for the 20-pin standard.
NOTE: All pins are on a 100 mil (2.54 mm) grid.
Figure 3. 20-Pin LaunchPad Standard
Considerations
The maximum height of a BoosterPack is 1700 mil. The maximum is 1350 mil if there is no need to
access the 3-pin GND, GND, VCC header (J3).
All pins can be used as GPIOs except VCC, GND, TEST, and RESET. It is highly recommended to first
use the six dedicated GPIO ports and to save special function pins for other BoosterPacks that may be
stacked.
Note that most ports are multiplexed for dual functionality. See the microcontroller data sheet for details.
TI recommends that the pins are used as shown to allow maximum compatibility with other systems. Of
course, this is only a recommendation and should not restrict design if changes are necessary.
** Note that TX and RX are in respect to LaunchPad. If you are building a BoosterPack, the RX and TX
lines are reversed.
* Capacitive Touch Sense-enabled I/O ports are available only on select devices. If this feature is not
available on a specific device, these are standard GPIOs.
4
Build Your Own LaunchPad™ or LaunchPad BoosterPack™ Development
Tool
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Electrical and Physical Specifications
www.ti.com
2.2
40-Pin LaunchPad and BoosterPack Standard
Figure 4 shows the pinout and dimensions for the 40-pin standard.
NOTE: All pins are on a 100 mil (2.54 mm) grid.
Figure 4. 40-Pin LaunchPad Standard
Considerations
The maximum height of a BoosterPack is 1700 mil. The maximum is 1350 mil if there is no need to
access header J5.
There is no detailed standard for the inner 20 pins (header J3 and J4). Use with care to ensure maximum
compatibility with the various LaunchPad evaluation kits and improve success of stacking additional
BoosterPacks.
All pins can be used as GPIOs except VCC, GND, TEST, and RESET. It is highly recommended to first
use the six dedicated GPIO ports to save special function pins for other BoosterPacks that may be
stacked.
Note that most ports are multiplexed for dual functionality. See the microcontroller data sheet for details.
TI recommends that the pins are used as shown to allow maximum compatibility with other systems. Of
course, this is only a recommendation and should not restrict design when necessary
** Note that TX and RX are in respect to LaunchPad. If you are building a BoosterPack, the RX and TX
lines are reversed.
* Capacitive Touch Sense-enabled I/O ports are available only on select devices. If this feature is not
available on a specific device, these are standard GPIOs.
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5
Electrical and Physical Specifications
2.3
www.ti.com
80-Pin LaunchPad and BoosterPack Standard
Note that an 80-pin LaunchPad board is not available from TI. However, this standard shows how an 80pin LaunchPad could be implemented.
Figure 5 shows the pinout and dimensions for the 80-pin standard.
NOTE: All pins are on a 100 mil (2.54 mm) grid.
Figure 5. 80-Pin LaunchPad Standard
Considerations
The maximum height of a BoosterPack is 3400 mil. The maximum is 3150 mil if there is no need to
access header J10.
The jumpers on the bottom (J6, J7, J8, and J9) have the same pinout functions as the headers on the top.
There is no detailed standard for the inner 20 pins (headers J3, J4, J8, and J9). Use with care to ensure
maximum compatibility with the various LaunchPad evaluation kits and improve success of stacking
additional BoosterPacks.
All pins can be used as GPIOs except VCC, GND, TEST, and RESET. It is highly recommended to first
use the six dedicated GPIO ports and to save special function pins for other BoosterPacks that may be
stacked.
6
Build Your Own LaunchPad™ or LaunchPad BoosterPack™ Development
Tool
Copyright © 2012, Texas Instruments Incorporated
SLAA542 – December 2012
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Useful Links and Resources
www.ti.com
Note that most ports are multiplexed for dual functionality. See the microcontroller data sheet for details.
TI recommends that the pins are used as shown to allow maximum compatibility with other systems. Of
course, this is only a recommendation and should not restrict design when necessary.
** Note that TX and RX are in respect to LaunchPad. If you are building a BoosterPack, the RX and TX
lines are reversed.
* Capacitive Touch Sense-enabled I/O ports are available only on select devices. If this feature is not
available on a specific device, these are standard GPIOs.
3
Useful Links and Resources
BoosterPack Design Guide (http://processors.wiki.ti.com/index.php/BoosterPack_Design_Guide)
LaunchPad and BoosterPack Eagle footprints (http://www.43oh.com/forum/viewtopic.php?f=35&t=1684)
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Copyright © 2012, Texas Instruments Incorporated
7
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