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SW3, Position 7, is the DSP switch that allows the user to control the DSP booting.
If the switch has the "ON" side pushed "DOWN" the DSP boots via EMIF A if ARM HPI
or PCI boot mode is not enabled. When the switch has the "ON" side "UP" position the
DSP is booted via the ARM. These two positions are shown in the table below.
ON Side
Down
SW3, Position 8, is the SR switch that allows the user to enable the core voltage
adjustment on two of the GPIO pins. If the switch has the "ON" pushed down GPIO pins
6 and 7are core voltage enabled. When the switch has the "ON" side "UP" GPIO
pins 6 and 7 assume their standard function. These two positions are shown in the
table below.
ON Side
Down
3.4.4 SW4, Power On Switch
Switch SW4 is toggle switch. when moved to the on position power is supplied to the
components on the board.
Table 26: SW3, Position 7, DSP
Pin
Up
"0"
DSP is booted via the ARM processor
"1"
DSP is booted via EMIF A if ARM HPI or
Table 27: SW3, Position 8, SR
Pin
Up
"0"
GPIO6 and GPIO7 Standard Function
"1"
GPIO6 and GPIO7 Core Voltage Enabled
Figure 3-22, SW4, Power On Switch
Function
PCI boot mode is not enabled
Function
PC Board
Spectrum Digital, Inc
3-31
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