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Develop an Application With the MSP-EXP430G2 LaunchPad
Figure 3. Code Composer Studio™ v4 in Debugging Mode
4.3
Disconnect Emulator From Target With Jumper J3
The connection between the MSP-EXP430G2 emulator and the attached target device can be opened
with the jumper array J3. This can be useful to access an attached eZ430 target board by disconnecting
the Spi-Bi-Wire JTAG lines RST and TEST or if the JTAG lines are used for other application purposes.
The jumper array can also be used to measure the power consumption of the LaunchPad application. For
this intention, all connections except VCC must be opened, and a multi meter can used on the VCC
Jumper to measure the current of the MSP-EXP430G2 target device and its peripherals. The jumper J5
VCC also must be opened if the LaunchPad board is powered with an external power supply over J6
Table 1
or the eZ430 interface J4.
NOTE:
The assignment of jumper J3 has been changed in MSP-EXP430G2 revision 1.5, see the
comments in
Table 1
to find the assignment for a specific board revision.
Table 1. Jumper Connection J3 Between Emulator and Target
Jumper
Signal
Description
1
VCC
Target socket power supply voltage (power consumption test jumper) (located on 5 before Rev. 1.5)
Test mode for JTAG pins or Spy-Bi-Wire test clock input during programming and test (located on 1 before
2
TEST
Rev. 1.5)
3
RST
Reset or Spy-Bi-Wire test data input/output during programming and test (located on 2 before Rev. 1.5)
4
RXD
UART receive data input (direction can be selected by jumper orientation) (located on 3 before Rev. 1.5)
5
TXD
UART transmit data output (direction can be selected by jumper orientation) (located on 4 before Rev. 1.5)
Jumpers 4 and 5 connect the UART interface of the emulator to the target device pins P1.1 and P1.2.
These jumpers can be used to select between a software (SW) UART or a hardware (HW) UART by their
orientation. In vertical orientation (SW UART), the jumpers connect the emulation TXD signal to target
P1.2 and the emulation RXD signal to target P1.1, as they are used for the software UART communication
on the demo application (see
Section 2.2
). In horizontal orientation (HW UART), the jumpers connect the
9
SLAU318F – July 2010 – Revised January 2015
MSP-EXP430G2 LaunchPad Evaluation Kit
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