WM9713L_06 WOLFSON [Wolfson Microelectronics plc], WM9713L_06 Datasheet - Page 21

• Manufacturer Part Number: WM9713L_06
• Description: AC 97 Audio + Touchpanel CODEC
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

Pre-Production
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PCM INTERFACE MODES
The WM9713L PCM audio interface may be configured in one of four modes:
PCM AUDIO DATA FORMATS
Four different audio data formats are supported:
All four of these modes are MSB first. They are described below. Refer to the Electrical
Characteristic section for timing information.
The PCM Interface may be configured for Mono mode, where only one channel of ADC data is
output. In this mode the interface should be configured for DSP mode. A short or long frame sync is
supported and the MSB is available on either the 1st (mode B) or 2nd (mode A) rising edge of
VXCLK.
Note that when operating in stereo mode the mono Voice DAC always uses the left channel data as
its input.
Figure 5 PCM Interface Mono Mode (mode A, FSP=0)
PCMADC/
PCMDAC
PCMCLK
PCMFS
Disabled Mode: The WM9713L disables and tri-states all PCM interface pins. Any
clock input is ignored and ADC/DAC data is not transferred.
Slave Mode: The WM9713L accepts PCMCLK and PCMFS as inputs from an
external source.
Master Mode: The WM9713L generates PCMCLK and PCMFS as outputs.
Partial Master Mode: The WM9713L generates PCMCLK as an output, and
accepts PCMFS as an external input.
DSP mode
Left justified
Right justified
I
2
S
1 PCMCLK
MSB
1
2
3
Input Word Length (WL)
n-2 n-1
LSB
n
1/fs
PP Rev 3.0 June 2006
WM9713L
21