WM8778-EV1M
w
Rev 1.1, February 2004
40
3. DAC = Master ADC = Slave
. The following switch and jumper settings should be made.
LINKS AND
JUMPERS
LINK / JUMPER /
SWITCH POSITION
DESCRIPTION
H1
Fit Jumpers (1,2) (5,6)
(9,10) (13,14)
DAC clocks and data
H2
Fit jumpers (1,2) (5,6)
(9,10)
ADC Clocks and data
J8
SHORT
DAC Master Mode (Level Shift Direction)
J9 (BCLK)
SHORT
Common BCLK from DAC
J11 (LRC)
SHORT
Common LRCLK from DAC
J12
OPEN
ADC Slave Mode (Level Shift Direction)
J14 (MCLK)
SHORT
Link MCLK (DAC MCLK to ADC)
SW1
1 2 3 4 5 6 DATA FORMAT
0 0 0 1 0 0 I
2
S Compatible
4. DAC = Slave ADC = Master
. The following switch and jumper settings should be made.
LINKS AND
JUMPERS
LINK / JUMPER /
SWITCH POSITION
DESCRIPTION
H1
Fit Jumpers (1,2) (5,6)
(9,10) (13,14)
DAC clocks and data
H2
Fit jumpers (1,2) (5,6)
(9,10)
ADC Clocks and data
J8
OPEN
DAC Slave Mode (Level Shift Direction)
J9 (BCLK)
SHORT
Common BCLK from ADC
J11 (LRC)
SHORT
common LRCLK from ADC
J12
SHORT
ADC Master Mode (Level Shift Direction)
J14 (MCLK)
SHORT
Link MCLK (DAC MCLK to ADC)
SW1
1 2 3 4 5 6 DATA FORMAT
1 0 0 1 0 0 I
2
S Compatible
Notes:
1.
The WM8778-EV1B does not have the functionality to create a separate ADCMCLK.
There are two options for the ADCMCLK. One is to use the common DACMCLK by
fitting J9, as suggested in table above. The other is to apply an external MCLK to H2/13
and the ground to pin H2/15.
2.
When the WM8778 is configured for master mode the I
2
S interface to the SPDIF crystal
(U4) will only operate in slave mode.
3.
Software configuration of the WM8778 for master and slave mode can be found within
the “Power Down and General Audio” panel. It should be noted that the SPDIF crystal
(U4) has an MCLK output which is fixed at 256x the sample rate (Fs).
Содержание WM8778-EV1B
Страница 1: ...WM8778 EV1B Evaluation Board User Handbook Rev 1 1...
Страница 25: ...WM8778 EV1M w Rev 1 1 February 2004 25 SCHEMATIC LAYOUT Figure 13 Functional Diagram...
Страница 26: ...WM8778 EV1M w Rev 1 1 February 2004 26 Figure 14 Digital Input...
Страница 27: ...WM8778 EV1M w Rev 1 1 February 2004 27 Figure 15 Software Control...
Страница 28: ...WM8778 EV1M w Rev 1 1 February 2004 28 Figure 16 Level Shift...
Страница 29: ...WM8778 EV1M w Rev 1 1 February 2004 29 Figure 17 Analogue Input and Output Mute...
Страница 30: ...WM8778 EV1M w Rev 1 1 February 2004 30 Figure 18 WM8778...
Страница 31: ...WM8778 EV1M w Rev 1 1 February 2004 31 Figure 19 Analogue Output...
Страница 32: ...WM8778 EV1M w Rev 1 1 February 2004 32 Figure 20 Power...
Страница 33: ...WM8778 EV1M w Rev 1 1 February 2004 33 WM8778 EV1B PCB LAYOUT Figure 21 Top Layer Silkscreen...
Страница 34: ...WM8778 EV1M w Rev 1 1 February 2004 34 Figure 22 Top Layer...
Страница 35: ...WM8778 EV1M w Rev 1 1 February 2004 35 Figure 23 Bottom Layer...
Страница 36: ...WM8778 EV1M w Rev 1 1 February 2004 36 Figure 24 Bottom Layer Silkscreen...
