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Table 6: Jumpers for the XStend Board.
Jumper
Setting
J8
Removing the shunt on this jumper disconnects the
power from LEDs D1—D8.
J4
Removing the shunt on this jumper disconnects the
power to the left LED display U1.
J7
Removing the shunt on this jumper disconnects the
power to the right LED display U2.
J16
Removing the shunt on this jumper disables the left
RAM U5 by pulling its chip-select pin high.
J17
Removing the shunt on this jumper disables the right
RAM U6 by pulling its chip-select pin high.
J11
Placing a shunt on this jumper disables the codec by
holding it in the reset state.
J13, J15
Placing shunts across two of the three pins of these
jumpers selects the digital de-emphasis for different
sampling rates:
0
0
De-emphasis for 32 KHz
0
1
De-emphasis for 44.1 KHz
1
0
De-emphasis for 48 KHz
1
1
De-emphasis off
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