Spectrum Digital eZdsp R2812 USB, Technical Reference, Page: 29 / 46

Spectrum Digital, Inc
2-17
2.4.1.1 JP4, +3.3/5 Volts for P8, P4
Jumper JP4 allows the user to provide 3.3 or +5 volts to pins 1 and 2 of
expansion connector P8, and pin 1 of P4. The settings for this jumper are shown in the
table below
* As shipped from factory
Table 11: JP4, +3.3/5 Volts for P8, P4
Position Function Jumper Position
Middle - Bottom
C5 Volts
to P8, pins 1,2,
and P4 pin1
Middle - Top
C3.3
Volts to P8, pins
1,2, and P4 pin1
No connect *
JP4
+5V
+3.3V
P4, pin 1
Figure 2-11, JP4 Layout
JP4
3.
3V
5V
JP4
3.
3V
5V
JP4
3.
3V
5V