Hardware Description
8
SPRUII7 – June 2018
Copyright © 2018, Texas Instruments Incorporated
C2000™ Piccolo™ F28004x Series LaunchPad™ Development Kit
2.1.7.1
BoosterPack Site 1
The F28004x LaunchPad features two fully independent BoosterPack XL connectors. BoosterPack 1,
located above the F28004x MCU and below the XDS110 debugger, is compliant with the BoosterPack
standard with a few exceptions as noted in
. To expand the functions available to the user on this
LaunchPad, some signals are also routed to alternate locations on the board. These alternate routes can
be selected by manipulating the onboard switches or adding/removing 0
Ω
resistors. This is described in
.
The GPIO pin number as well as the BoosterPack compliant features are listed in
. Each GPIO
has multiple functions available through the GPIO mux. A few special functions have also been listed
above; the full GPIO mux table can be found in the
TMS320F28004x Piccolo Microcontrollers Data Sheet
.
2.1.7.2
BoosterPack Site 2
The second BoosterPack XL interface is located near the bottom of the board, under the F28004x MCU.
This interface is compliant with the BoosterPack standard with a few exceptions as noted in
. To
expand the functions available on this LaunchPad, some signals are also routed to alternate locations on
the board. These alternate routes can be selected by manipulating the onboard switches or adding or
removing 0
Ω
resistors. This is described in
.
The GPIO pin number as well as the BoosterPack compliant features are listed in
. Each GPIO
has multiple functions available through the GPIO mux. A few special functions have also been listed
above; the full GPIO mux table can be found in the
TMS320F28004x Piccolo Microcontrollers Data Sheet
2.1.8
Analog Voltage Reference Header
The analog subsystem of the F28004x allows for flexible voltage reference sources. The ADC and DAC
modules are referenced to the VREFHIx and VREFLOx pin voltages. VREFHIx can either be driven
externally or can be generated by an internal bandgap voltage reference. An external voltage can be
supplied to header J15 as an external voltage source for VREFHIx. Note that there is no signal
conditioning circuitry in place for the voltage reference. For best performance, some additional circuitry
may be required.
2.1.9
Other Headers and Jumpers
The Piccolo LaunchPad has multiple jumpers to select different power sources for the board. This
LaunchPad also provides a way to isolate the connected USB from the device, allowing for safe operation
and debugging in high-voltage applications.
2.1.9.1
USB Isolation Block
JP1, JP2, and JP3 are provided to enable isolation between the device and the connected USB in high-
voltage applications. The area of isolation is defined by the white outline in the upper-left corner of the
LaunchPad. JP1 separates the GND of USB region and the MCU region of the LaunchPad. JP2 separates
3.3 V, and JP3 separates 5 V. By default, all three jumpers are shorted and the power is supplied by the
connected USB, meaning that the USB is NOT isolated from the MCU region. If power isolation is desired,
remove the supplied shunts from JP1, JP2, and JP3. In this configuration, a 3.3 V supply must be
connected to the MCU region to power the F280049C MCU and the other on-board circuitry, including the
XDS110 debug probe. Some applications may not require 5 V to be supplied to the MCU region. In an
isolated power application with JP3 removed, supplying 5 V to the MCU region is optional.
2.1.9.2
BoosterPack Site 2 Power Isolation
JP8 is supplied to isolate 3.3 V and 5 V from the BoosterPack 2 headers. This might be required if two
BoosterPacks are simultaneously connected to the LaunchPad and both provide power to the LaunchPad.
If this is the case, power can be isolated by removing the shunts on JP8 and there will be no contention
between the two BoosterPacks.
