Spectrum Digital eZdsp F2808, Техническое описание

Страница: 28 / 48

Spectrum Digital, Inc
2-16 eZdsp
TM
F2808 Technical Reference
2.4.1 JP4, Voltage Jumper, +3.3/5 Volts for P8, P4
Jumpers JP4 is an unpopulated jumper on the bottom side of the board that
provide 3.3 volts or +5 volts to pins on the expansion connector. This
jumper is shipped uninstalled to prevent accidental damage by connecting wires or
circuitry to the expansion connector. The user may connect the jumper by installing
a jumper wire or zero ohm resistor. The position of this jumper is shown in the
figure below.
Jumper JP4 allows the user to provide 3.3 or +5 volts to pins 1 and 2 of
expansion connector P8.
The table below shows the functions of the two positions of JP4.
Table 11: JP4, Voltage 3.3/5 Volts for P8, P4
Posittion Function
1 - 2 +5V connected to P8
2 - 3 +3.3 connected to P8
Figure 2-11, eZdsp
TM
F2808 Jumper Positions (Bottom Side)
JP4 JP6
JP4
+5V
+3.3V
Figure 2-12, JP4 Layout
1
2
3