wm8805 Wolfson Microelectronics plc, wm8805 Datasheet - Page 19

• Manufacturer Part Number: wm8805
• Description: 8 1 Digital Interface Transceiver With Pll
• Manufacturer: Wolfson Microelectronics plc

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Production Data
DIGITAL ROUTING CONTROL
See page 20 for a full description of the signal routing options available in the WM8805. In Software
control mode the values set in registers TXSRC and RXINSEL determine the S/PDIF Rx data source
and destination. In hardware control mode the device can receive data only from RX0 but can set the
value of TXSRC directly using the CSB pin. This determines the S/PDIF transmitter data source
Table 15 S/PDIF Transmitter Digital Routing Control Configuration
AUDIO INTERFACE CONTROL
In software control mode the audio data word length and audio data format can be set independently
for the receiver and transmitter sides of the interface. However, in hardware control mode both sides
of the interface are combined and the configuration is set using SDOUT and GPO0 pins as described
in Table 6 and Table 16. Note that AIF_CONF[1:0] configures the audio interface when the device
operates in hardware mode.
Table 16 Digital Audio Interface Control in Hardware Control Mode
STATUS INFORMATION
In hardware control mode the WM8805 outputs a selection of status flags for the user. Table 17
describes the flags which are available and the output pins on which they are available.
Table 17 Hardware Control Mode Status Flag Configuration
A full description of the status flags is given in Table 45.
AIFCONF[1]
(HARDWARE
GPO0 /
SDOUT
MODE)
GPO0
SCLK
CSB
CSB
PIN
0
0
1
1
PIN
AIFCONF[0]
STATUS FLAG
SDOUT /
TRANS_ERR
NON_AUDIO
(SOFTWARE
GEN_FLAG
REGISTER
UNLOCK
TXSRC
0
1
0
1
MODE)
24-bit Left Justified With Flags
S/PDIF Rx
16-bit Right Justified
0
DESCRIPTION
16-bit I
24-bit I
2
2
S
S
AIF Rx
1
PD, Rev 4.5, March 2009
WM8805
19