miriac SBC-S32V234 User Manual
V 1.0
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© MicroSys Electronics GmbH 2018
4.2
Boot Mode Configuration
The MPX-S32V234 module offers several different boot modes to choose from.
The settings can be done via the sliding switch BMD on the module and two
BOOT-SEL signals on the MXM connectorr according to the following table.
The switch BMD sets the BMODE[0] and BMODE[1] signals of the CPU to low,
while the two configuration resistors BMD0 and BMD1 are used to set a fixed low
value on these lines.
The BMD, BMD0 and BMD1 parts are located on the MPX-S32V234 module.
green denotes the default configuration
Note 1)
BMD0 and BMD1 are soldered resistors (size 0402) and not intended to be
changed by user.
Shown positions set the corresponding BTMOD0/1 line to low. BTMOD0 controls
the CPU configuration port PC9, i.e. BOOTMOD(0), while BTMOD1 is connected to
the CPU configuration port PC10, i.e. BOOTMOD(1).
Boot Mode
BMD-Switch
BMD0
1)
BMD1
1)
Serial Download, virgin device
No function
installed
installed
Serial Download, virgin device
Position 0
removed
installed
Serial Download, prog. device
Position 1
removed
installed
RCON Boot, if no fuses
Position 0
installed
removed
Serial Download, prog. device
Position 1
installed
removed
RCON Boot, no fuses
Position 0
removed
removed
Serial Download, prog. device
Position 1
removed
removed
Figure 4: BMD Switch
Figure 6: Position BTM1=low
Figure 5: Position BTM0=low
