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M-Station Baseboard
7.2
Power Supply Options, JP2 Settings
Having the M-Station supply power to the micro-board or target system is the normal method of
operation. When the M-Station supplies power to the micro-board, set JP2 to select the source of the
V
power to the micro-board.
DD
•
Set JP2 to the "REG" position to supply V
the V
J8 power connector provides the M-Station's power.
•
Set JP2 to the "BAT" position to select the battery power provided by the three AAA-size
batteries mounted in the battery pack on the underside of the M-Station baseboard. In this
case, the batteries supply V
of the micro-board or for communication using the MSTTERM program. Flash programming
is not possible in this configuration.
•
When the target system supplies its own power, remove JP2 so that neither "BAT" nor
"REG" is connected. In this case, the target system supplies V
programming and communication cable. Removing JP2 in this situation prevents a power
conflict between the M-Station power and the target power.
7.3
Power Monitoring Options, JP1 Settings
The M-Station can monitor V
connector or the 100-pin connectors to the micro-board. The software uses the V
whether the target system has power or not. The V
circuits on the M-Station baseboard, to ensure a proper match between M-Station and target voltages.
•
When the micro-board or target system provides the V
jumper.
•
When the target system or micro-board does not supply the V
circuitry does not have power. This is the case with older boards, such as the K0RE9418,
whose V
voltage set by the JP3 jumper option. In this case, the AC adaptor connected to the
DD
DD
in the target system through the V
DD
voltage can be derived by connecting JP1 pins 1 and 2.
DE
⎯ JP1 connects the V
DE
connector.
⎯ When JP1 is connected, the same source provides V
power selected on the M-Station baseboard when JP2 is connected or from the target
V
through the flash programming connector when JP2 is not connected.
DD
from the variable on-board V
DD
and the AC adaptor is not required for standalone operation
signal also provides power to the interface
DE
DE
signal to the VDD_FLASH signal on the flash programming
40
regulator, with
DD
through the flash
DD
signal on the flash programming
DE
signal to sense
DE
signal, don't connect the JP1
signal, the interface
DE
and VDD_FLASH: either the
DE
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