WM8777
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REGISTER
ADDRESS
BIT
LABEL
CHANNEL
STATUS
BIT
DEFAULT
DESCRIPTION
(39h)
0
CON/PRO
0
0
0 = Consumer Mode
S/PDIF
1 = Professional Mode (not supported by
WM8777)
Transmitter
Channel Bit
Control 1
1
2
AUDIO_N
CPY_N
1
0
0
0 = S/PDIF transmitted data is audio PCM.
1 = S/PDIF transmitted data is not audio
PCM.
2
0 = Transmitted data has copyright asserted.
1 = Transmitted data has no copyright
assertion.
5:3
PREEMPH
[2:0]
5:3
000
000 = Data from Audio interface has no pre-
emphasis.
001 = Data from Audio interface has pre-
emphasis.
010 = Reserved (Audio interface has pre-
emphasis).
011 = Reserved (Audio interface has pre-
emphasis).
All other modes are reserved and should not
be used.
7:6
CHSTMODE
[1:0]
7:6
00
S/PDIF Channel status bits.
00 = Only valid mode for consumer
applications.
All other modes are reserved.
Table 34 S/PDIF Tx Channel Bit Control 1
REGISTER
ADDRESS
BIT
LABEL
CHANNEL
STATUS
BIT
DEFAULT
DESCRIPTION
(3Ah)
7:0
CATCODE
[7:0]
15:8
00000000
Category Code. Refer to S/PDIF
specification for details.
S/PDIF
Transmitter
Channel Bit
00h indicates “general” mode.
Control 2
Table 35 S/PDIF Tx Channel Bit Control 2
REGISTER
ADDRESS
BIT
LABEL
CHANNEL
STATUS
BIT
DEFAULT
DESCRIPTION
(3Bh)
3:0
5:4
SRCNUM
[3:0]
19:16
0000
00
Source Number. No definitions are attached
to data. See S/PDIF specification for details.
S/PDIF
Transmitter
Channel Bit
Control 3
CHNUM1[1:0]
23:20
Channel Number for Subframe 1
CHNUM1
Channel Status Bits[23:20]
00
0000 = Do not use channel
number
01
10
11
0001 = Send to Left Channel
0010 = Send to Right Channel
0000 = Do not use channel
number
7:6
CHNUM2[1:0]
00
Channel Number for Subframe 2
CHNUM2
Channel Status Bits[23:20]
00
0000 = Do not use channel
number
01
10
11
0001 = Send to Left Channel
0010 = Send to Right Channel
0000 = Do not use channel
number
Table 36 S/PDIF Tx Channel Bit Control 3
PP Rev 1.94 November 2004
48
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
