CDB8422
Switch S7 controls the remaining options for the CS8422 in hardware mode, see Table 5 for switch config-
urations. The NV/RERR (CS8422 pin 9) and V/AUDIO (CS8422 pin 10) signals are provided at header J26
pins 5 and 2, respectively, and their states are indicated by LEDs D2 and D3. The TX/U (CS8422 pin 18)
signal is provided at pin 1 of J31. If the transmitter pass-through option is selected for this signal, the data
can be sent to the optical and coaxial output S/PDIF connectors by shunting the bottom two pins of J31.
POSITION
1
2
3
4
5
6
LABEL
RX_SELECT
TX_SELECT
TX_U/OUT
SEL
NV/RERR
SEL
V/AUDIO SEL
SRC MCK
SEL
PURPOSE
Selects Active Receiver Input
Pins
Selects Receiver Input to be Out-
put to Transmitter Pass-through
Selects Transmitter Pass-through
or U Data Output on Pin 18
Selects NV or RERR Output on
Pin 9
Selects Validity Data Output or
AUDIO Indicator Output on Pin 10
Selects MCLK Source for Serial
Output Port 1
SETTING
0
1
0
1
0
1
0
1
0
1
0
1
FUNCTION SELECTED
RXP0/RXN0 Selected
RXP1/RXN1 Selected
RXP0/RXN0 Selected
RXP1/RXN1 Selected
Transmitter Pass-through Output
Incoming U Data Output
NVERR Output
RERR Output
Validity Data Output
AUDIO Indicator Output
XTI - XTO Selected
RMCK Selected
Table 5. S7 Settings
Note:
DS692DB2
Position 6 also selects either the CS8422’s RMCK or MCLK_OUT signal to send to the SAO1 head-
er J24 and the CS8406’s OMCK pin.
27
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