Cirrus Logic CDB8422 - Manual (Page 27)

DS692DB2 27
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.
Note: 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.
POSITION LABEL PURPOSE SETTING FUNCTION SELECTED
1 RX_SELECT
Selects Active Receiver Input
Pins
0 RXP0/RXN0 Selected
1 RXP1/RXN1 Selected
2 TX_SELECT
Selects Receiver Input to be Out-
put to Transmitter Pass-through
0 RXP0/RXN0 Selected
1 RXP1/RXN1 Selected
3
TX_U/OUT
SEL
Selects Transmitter Pass-through
or U Data Output on Pin 18
0 Transmitter Pass-through Output
1 Incoming U Data Output
4
NV/RERR
SEL
Selects NV or RERR Output on
Pin 9
0 NVERR Output
1 RERR Output
5 V/AUDIO SEL
Selects Validity Data Output or
AUDIO Indicator Output on Pin 10
0 Validity Data Output
1 AUDIO Indicator Output
6
SRC MCK
SEL
Selects MCLK Source for Serial
Output Port 1
0 XTI - XTO Selected
1 RMCK Selected
Table 5. S7 Settings