wm8400 Wolfson Microelectronics plc, wm8400 Datasheet - Page 115

• Manufacturer Part Number: wm8400
• Description: Wolfson Audioplustm Hi-fi Audio Codec And Power Management Unit For Mobile Multimedia
• Manufacturer: Wolfson Microelectronics plc

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Pre-Production
Figure 58 Interface 2 = Master
Figure 56 Master Mode with ADCLRC as GPIO
OPERATION WITH ADCLRC AS GPIO
When the ADCLRC/GPIO1 pin is configured as a GPIO pin (ALRCGPIO=1), the DACLRC pin is
used as a frame clock for ADCs and DACs as shown in Figure 56 and Figure 57. The ADCs and
DACs must operate at the same sample rate in this configuration.
OPERATION WITH ALTERNATIVE DAC INTERFACE
To allow data to be input to the WM8400 DACs from two separate sources, the GPIO[5:3] pins can
be configured as an alternative DAC interface (BCLK2, DACLRC2, DACDAT2) as shown in Figure 60
to Figure 63.
Figure 57 Slave Mode with ADCLRC as GPIO
Figure 59 Interface 2 = Slave
AIF_MSTR2=0
WM8400
BCLK2
DACLRC2
DACDAT2
PP, April 2009, Rev 3.0
WM8400
Processor
#2
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