WM8750-EV1M Ver la hoja de datos (PDF) - Wolfson Microelectronics plc

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WM8750-EV1M

Evaluation Board User Handbook

Wolfson Microelectronics plc 

WM8750-EV1M

The ‘Submit All’ button will submit values to every register of the WM8750. The ‘Reset’

button writes to the reset register (R15) but does not reset the control panel values. If the

previous values are to be resubmitted then the ‘Submit All’ button should be pressed, if the

user would like to start afresh then the ‘Reset Software Panel Settings’ button should also be

pressed. Pressing this button does not write to the device, it only resets the panel settings to

their default state. Left clicking on the Wolfson logo will open the PCs default web browser

and go to the Wolfson Microelectronics website (‘www.wolfsonmicro.com’). The DAC, ADC

and Line setup buttons have also been provided as a quick start approach. Pressing either of

these buttons will power up the DAC, ADC or Line signal paths in a known state as described

in the following pages.

Important: The CS8427 SPDIF decoder IC will only work at a rate of 256fs. This will limit

the sample rates that may be set using the WM8750 unless an external source is used to

supply signals directly to the relevant pins of header H1 or taking the signals from the

relevant pins of header H2.

DAC SUBMIT SETUP

By pressing the ‘DAC Setup’ button, the software writes to the device setting the following

path: SPDIF_In through the DAC to the L/ROUT1 and L/ROUT2 outputs. The default format

setting is 24-bit, I2S. Table 6 lists the required board settings to allow this signal path to be

used. This button is intended to ease the initial use of the WM8750 until the user becomes

familiar with both device and software operation.

Figure 5 Recommended DAC Setup

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Rev 2.0, February 2005

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