CS4349
Control Port Definitions
AD1/CDOUT
1
2
3
4
8
Address Bit 1 / Serial Control Data Out (I/O) - Chip address bit 1 in I²C Mode or data output in SPI Mode
Address Bit 0 / Chip Select (Input) - Chip address bit 0 in I²C Mode or Chip Select in SPI Mode
Serial Control Data In (I/O) - Input/Output for I²C data. Input for SPI data
AD0/CS
SDA/CDIN
SCL/CCLK
TSTO
Serial Control Port Clock (Input) - Serial clock for the control port interface
Test Output (Output) - This pin needs to be floating and not connected to any trace or plane.
Stand-Alone Definitions
DIF0
DIF1
DIF2
3
4
1
Digital Interface Format (Input) - Defines the required relationship between the Left Right Clock, Serial
Clock, and Serial Audio Data
DEM
De-emphasis (Input) - Selects the standard 15 μs/50 μs digital de-emphasis filter response for
2
8
44.1 kHz sample rates
POPGUARD
Popguard Disable (Input/Output) - At RST this pin is an input to disable PopGuard when pulled high;
Otherwise leave floating. After RST is released this pin becomes TSTO.
DS782F1
7
CIRRUS [ CIRRUS LOGIC ]
