WM8805
Production Data
Frame
192
Frame
1
. . . . . . . . .
Subframe 1
Subframe 2
0
3 4
7 8
27 28
31
Sync
preamble
Aux
Audio Sample Word
V
U
C
P
32 bits
Figure 6 S/PDIF Format
POWER UP CONFIGURATION
The operating mode of the WM8805 is dependent upon the state of SDIN, SCLK, SDOUT, CSB and
GPO0 when the device is powered up or a hardware reset occurs. Table 6 summarises the
configuration options.
HW RESET = 0
HW RESET = 1
SWMODE
SWMODE
HWMODE
HWMODE
SDIN
HWMODE / SWMODE Select
SDIN
SCLK
N/A
GPO
(TRANS_ERR)
SCLK
N/A
N/A
AIF_MS
2-wire
GPO
3-wire
SDOUT
3-wire
GPO
(NON_AUDIO)
SDOUT
CSB
AIF_CONF[0]
2-wire
3-wire
N/A
2-wire
GPO
TXSRC
Device
Address
(UNLOCK)
GPO
CSB
2-wire/3-wire
Mode Select
GPO
GPO0
AIF_CONF[1]
GPO
(GEN_FLAG)
Note: AIF_CONF[1:0] configures the audio interface when the device operates in hardware mode.
Refer to Table 16 for description of modes.
Table 6 Device Configuration at Power up or Hardware Reset
PD Rev 4.1 September 07
12
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
