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REGISTER
WM8777
BIT
LABEL
CHANNEL
STATUS
BIT
DEFAULT
DESCRIPTION
ADDRESS
(3Ch)
3:0
FREQ[3:0]
27:24
0001
Sampling Frequency. See S/PDIF
specification for details.
S/PDIF
Transmitter
Channel Bit
Control 4
0001 = Sampling Frequency not indicated.
Clock Accuracy of Generated clock.
00 = Level II
5:4
CLKACU[1:0]
29:28
11
01 = Level I
10 = Level III
11 = Interface frame rate not matched to
sampling frequency.
Table 37 S/PDIF Tx Channel Bit Control 4
REGISTER
ADDRESS
BIT
LABEL
CHANNEL
STATUS
BIT
DEFAULT
DESCRIPTION
(3Dh)
0
MAXPAIFRX_WL
32
1
Maximum Audio sample word length
0 = 20 bits
S/PDIF
Transmitter
Channel Bit
Control 5
1 = 24 bits
3:1
TXPAIFRX_WL
[2:0]
35:33
101
Audio Sample Word Length.
000 = Word Length Not Indicated
TXPAIFRX_
WL
MAXPAIFR
X_WL==1
MAXPAIFR
X_WL==0
001
010
100
101
110
20 bits
22 bits
23 bits
24 bits
21 bits
16 bits
18 bits
19 bits
20 bits
17 bits
All other combinations reserved
7:4
ORGSAMP
[3:0]
39:36
0000
Original Sampling Frequency. See S/PDIF
specification for details.
0000 = original sampling frequency not
indicated
Table 38 S/PDIF Tx Channel Bit Control 5
PP Rev 1.94 November 2004
49
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
