WM8778-EV1M
w
Rev 1.1, February 2004
15
WOLFSON LOGO
Left clicking on the Wolfson logo will open the PCs default web browser and go top the
Wolfson Microelectronics website (‘
www.wolfsonmicro.com
’).
On the main panel there are three buttons, “DAC Setup”, “ADC Setup” and “Line Setup”
which have 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:
It must be noted that 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 WM8778 unless an external
source is used supplying signals directly to the relevant pins of header H1 or taking the
signals from the relevant pins of header H2.
POWER MANAGEMENT CONTROL PANEL
Figure 6 Power and Interface Control
The Power Down and Interface Control panel is used to enable/disable the various sections
of the WM8778. It is also used to individually set the audio interface to the required data
format for both the ADC and DAC. Pressing the ‘Power Submit’ button will cause the settings
shown on this panel to be written to the WM8778. A full device register write is not sent using
the ‘Power Submit’ button.
Summary of Contents for WM8778-EV1B
Page 1: ...WM8778 EV1B Evaluation Board User Handbook Rev 1 1...
Page 25: ...WM8778 EV1M w Rev 1 1 February 2004 25 SCHEMATIC LAYOUT Figure 13 Functional Diagram...
Page 26: ...WM8778 EV1M w Rev 1 1 February 2004 26 Figure 14 Digital Input...
Page 27: ...WM8778 EV1M w Rev 1 1 February 2004 27 Figure 15 Software Control...
Page 28: ...WM8778 EV1M w Rev 1 1 February 2004 28 Figure 16 Level Shift...
Page 29: ...WM8778 EV1M w Rev 1 1 February 2004 29 Figure 17 Analogue Input and Output Mute...
Page 30: ...WM8778 EV1M w Rev 1 1 February 2004 30 Figure 18 WM8778...
Page 31: ...WM8778 EV1M w Rev 1 1 February 2004 31 Figure 19 Analogue Output...
Page 32: ...WM8778 EV1M w Rev 1 1 February 2004 32 Figure 20 Power...
Page 33: ...WM8778 EV1M w Rev 1 1 February 2004 33 WM8778 EV1B PCB LAYOUT Figure 21 Top Layer Silkscreen...
Page 34: ...WM8778 EV1M w Rev 1 1 February 2004 34 Figure 22 Top Layer...
Page 35: ...WM8778 EV1M w Rev 1 1 February 2004 35 Figure 23 Bottom Layer...
Page 36: ...WM8778 EV1M w Rev 1 1 February 2004 36 Figure 24 Bottom Layer Silkscreen...
