Cs43l21 – Cirrus Logic CS43L21 User Manual
Page 7
DS723F1
7
CS43L21
AOUTB
AOUTA
10
11
Analog Audio Output (Output) - The full-scale output level is specified in the DAC Analog Characteris-
tics specification table
VA
12
Analog Power (Input) - Positive power for the internal analog section.
AGND
13
Analog Ground (Input) - Ground reference for the internal analog section.
FILT+
14
Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling circuits.
VQ
15
Quiescent Voltage (Output) - Filter connection for internal quiescent voltage.
NIC
16
Not Internally Connected - This pin is not connected internal to the device and may be connected to
ground or left “floating”. No other external connection should be made to this pin.
TSTO
17
Test Out (Output) - This pin is an output used for test purposes only and must be left “floating” (no con-
nection external to the pin).
TSTO
18
Test Out (Output) - This pin is an output used for test purposes only and must be left “floating” (no con-
nection external to the pin).
TSTO
19
Test Out (Output) - This pin is an output used for test purposes only and must be left “floating” (no con-
nection external to the pin).
TSTO
20
Test Out (Output) - This pin is an output used for test purposes only and must be left “floating” (no con-
nection external to the pin).
TSTO
21
22
Test Out (Output) - This pin is an output used for test purposes only and must be left “floating” (no con-
nection external to the pin).
TSTO
23
24
Test Out (Output) - This pin is an output used for test purposes only and must be left “floating” (no con-
nection external to the pin).
RESET
25
Reset (Input) - The device enters a low power mode when this pin is driven low.
VL
26
Digital Interface Power (Input) - Determines the required signal level for the serial audio interface and
host control port. Refer to the Recommended Operating Conditions for appropriate voltages.
VD
27
Digital Power (Input) - Positive power for the internal digital section.
DGND
28
Digital Ground (Input) - Ground reference for the internal digital section.
TSTO
(M/S)
29
Test Out (Output) - This pin is an output used for test purposes only and must be left “floating” (no con-
nection external to the pin).
Serial Port Master/Slave (Input/Output) - Hardware Mode Startup Option: Selects between Master and
Slave Mode for the serial port.
MCLK
30
Master Clock (Input) - Clock source for the delta-sigma modulators.
SCLK
31
Serial Clock (Input/Output) - Serial clock for the serial audio interface.
SDIN
32
Serial Audio Data Input (Input) - Input for two’s complement serial audio data.
Thermal Pad
-
Thermal relief pad for optimized heat dissipation. See
.