Cirrus Logic CDB42428 - Manual (Page 10)

CDB42428
10
2. INITIAL BOARD SETUP
2.1 Power Supplies:
1) Verify that all power supplies are off before making connections.
2) Connect a +5.0 VDC power supply to the +5 V (J48) red binding post. Select VLS and VD operating voltage by
placing a jumper on J37 and J38 to select either +5 V or +3.3 V.
3) Connect a +12.0 to +18.0 VDC power supply to the +18 V (J50) green binding post. If using the FILT position
number 2 for the output filter stage, then supply +18.0 V only.
4) Connect a -12.0 to -18.0 VDC power supply to the -18 V (J51) yellow binding post. If using the FILT position
number 2 for the output filter stage, then supply -18.0 V only.
5) Connect the common ground of the power supplies to the GND (J49) binding post.
6) Attach parallel port cable between board and computer.
7) Attach all required analog and digital cables to the board jacks and connectors.
8) If using the DSP Header connection, attach the required user supplied flat ribbon cable to the header with the
power supplies turned off.
9) If using the External Control Header connection, attach the required user supplied flat ribbon cable to the header
with the power supplies turned off. Note that external controller must ground the EXT_CONTROL_PRESENT-
signal to gain control of the I
2
C/SPI signals. This can be done easily by connecting External Control Header pins
1 and 2 together.
10) With all cables and connections in place, turn on the power supplies to the board. Turn on supplies in this order:
+5 V, +18 V, -18 V.
11) Press and release the MASTER RESET switch S1. The LED, D1, will illuminate as long as S1 is depressed in-
dicating a reset condition. Once S1 is released, the LED should turn off. If it remains on, an error has occurred.
At this point, power off the power supplies and re-check all connections. Apply power to the board and press
and release S1. Once the LED has turned off, the board should now be ready for setup and use.
2.2 Installing the Software:
1) Copy the “CDB GUI” folder and all of its contents from the included CD to a convenient location on your PC.
2) If desired, create a shortcut to CDB425xx.EXE on your desktop. You should now be able to run CDB425xx.EXE.
Double-click on CDB425xx.EXE or its shortcut. Note that the software will configure itself to operate with a
CDB424xx depending upon which is connected to the parallel port.
3) Select the LPT port you are using to connect to the CDB42428.
4) Shut down the application, reset the board, and then restart the application.