3
5. Hardware Installation
Power may be provided locally from
two
on-board AAA batteries, externally from a
Flash emulation tool (FET), or an external supply. The power source is selected
by configuring jumpers VCC_1, VCC_2, and BATT. PWR1 and PWR2 will supply
power to each MSP430 independently. Appendix B has information on the exact
location of these jumpers. Figure 3 shows the jumper hierarchy and configuration
options.
Figure 3: Jumper
S
ettings for
P
ower
S
election
The battery jumper
BATT
is used to select the on-board batteries to power the
system, independent of the FET connections. The user must ensure that this
voltage meets the requirement for proper functionality of the MSP430.
The power selection jumpers
VCC_1
and
VCC_2
select the power connections
between the board and each FET interface. These jumpers are two rows of 3-pin
headers, one for each MSP430 on-board.
VCC_1
, the bottom row, is for the
MSP430FG4618 and,
VCC_2
on the top row, is for the MSP430F2013. A jumper
placed on the rightmost 2-pins (
FET
) selects the JTAG FET as the power source.
A jumper placed on the leftmost 2-pins (
LCL
) would enable local power (either
from the batteries or an external supply) to be applied to each FET for proper logic
threshold level matching during program/debug.
Headers
PWR1
and
PWR2
have been provided to enable power to the individual
MSP430s. A jumper placed on
PWR1
provides power to the MSP430FG4618 and
a jumper placed on
PWR2
provides power to the MSP430F2013. Individual device
current consumption can be measured via each of these jumpers. Care should be
taken that MSP430 interconnections are not made that could influence such a
measurement.
Once the required power selections have been made the experimenter’s board is
ready to be used. Both the MSP430FG4618 and MSP430F2013 are factory
programmed. After power up, the MSP430FG4618 executes an ultra-low power
real-time clock displayed on the LCD. The MSP430F2013 pulses
LED3
from
LPM3 using the VLO as a periodic wake-up time base.
