WM8581SEFT Wolfson Microelectronics Ltd., WM8581SEFT Datasheet - Page 71

• Manufacturer Part Number: WM8581SEFT
• Description: Multichannel Codec with S/pdif Transceiver
• Manufacturer: Wolfson Microelectronics Ltd.

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STATUS PINS
In Hardware control mode, SDO, SWMODE and
Table 71 Hardware Mode Status Pins
DIGITAL AUDIO INTERFACE CONTROL
In Hardware Control Mode, CSB and SCLK become controls to configure the Primary Audio Interface
data format and word length. The configuration applies to both transmit and receive sides of the
interface. Table 72 below shows the options available.
Table 72 Audio Interface Hardware Mode Control
DAC MUTE CONTROL
In Hardware Control mode, the MUTE pin activates the softmute function on all the DACs. In
Software Control mode, MUTE activates softmute on the DAC selected by the DZFM register (when
the MPDENB bit is low). See page 34 for a detailed description of the softmute function and the
other methods of activating softmute.
When floating, the MUTE pin becomes an output for the ZFLAG flag.
Table 73 MUTE Pin Control Options
SWMODE
MFP10
MFP8
MFP9
SDO
Floating
PIN
MUTE
0
1
CSB
0
0
1
1
NON_AUDIO
SFRM_CLK
UNLOCK
192BLK
FLAG
Normal Operation
Mute DAC channels
MUTE is an output to indicate when Zero Detection occurs on all DACs
(ZFLAG).
H = detected, L = not detected.
C
Indicates that the S/PDIF Clock Recovery circuit is unlocked
or that the input S/PDIF signal is not present.
0 = Locked to incoming S/PDIF stream.
1 = Not locked to the incoming S/PDIF stream, or incoming
stream not present.
Logical OR of PCM_N and AUDIO_N:
PCM_N indicates that non-audio code (defined in IEC-61937)
has been detected. AUDIO_N is the recovered Channel
Status bit-1.
Recovered channel-bit for current sub-frame
Indicates current sub-frame:
1 = Sub-frame A
0 = Sub-frame B
Indicates start of 192-frame block. High for duration of frame
0, low after frame 0.
SCLK
MFP8/9/10
0
1
0
1
DESCRIPTION
DESCRIPTION
pins provide S/PDIF status flag information.
24-bit right justified
20-bit right justified
24-bit left justified
24-bit I
FORMAT & WORD LENGTH
2
PP Rev 1.0 March 2006
S
WM8581
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