CS42888_07 Datasheet, PDF (7/61 Pages) Cirrus Logic – 108 dB, 192 kHz 4-In, 8-Out CODEC

DAC_SDIN1
DAC_SDIN2
DAC_SDIN3
DAC_SDIN4
DAC_SCLK
DAC_LRCK
AUX_LRCK
AUX_SCLK
AUX_SDIN
AOUT1 +,-
AOUT2 +,-
AOUT3 +,-
AOUT4 +,-
AOUT5 +,-
AOUT6 +,-
AOUT7 +,-
AOUT8 +,-
MUTEC
AGND
VQ
VA
AIN1 +,-
AIN2 +,-
AIN3 +,-
AIN4 +,-
FILT+_DAC
FILT+_ADC
TSTN
INT
SCL/CCLK
SDA/CDOUT
CS42888
17
16
15
DAC Serial Audio Data Input (Input) - Input for two’s complement serial audio data.
14
18
DAC Serial Clock (Input/Output) - Serial clock for the DAC serial audio interface. Input fre-
quency must be 256xFs in the TDM digital interface format.
DAC Left/Right Clock (Input/Output) - Determines which channel, Left or Right, is currently
19 active on the DAC serial audio data line. Signals the start of a new TDM frame in the TDM digital
interface format.
20
Auxiliary Left/Right Clock (Output) - Determines which channel, Left or Right, is currently
active on the Auxiliary serial audio data line. Derived from the ADC serial port and equals Fs.
21 Auxiliary Serial Clock (Output) - Serial clock for the Auxiliary serial audio interface.
22
Auxiliary Serial Input (Input) - Provides an additional serial input for two’s complement serial
audio data. Used only in the TDM digital interface format.
26, 25
27, 28
30, 29
31, 32 Differential Analog Output (Output) - The full-scale analog output level is specified in the Ana-
34, 33 log Characteristics table. Each leg of the differential outputs may also be used single-ended.
36, 37
38, 39
40, 41
35
Mute Control (Output) - Used as a control for external mute circuits to prevent the clicks and
pops that can occur in any single supply system.
42, 56 Analog Ground (Input) - Ground reference for the analog section.
43 Quiescent Voltage (Output) - Filter connection for internal quiescent reference voltage.
44, 53
Analog Power (Input) - Positive power supply for the analog section. See “Digital I/O Pin Char-
acteristics” on page 8.
46, 45
48, 47
50, 49
52, 51
Differential Analog Input (Input) - Signals are presented differentially or single-ended to the
Delta-Sigma modulators. The full-scale input level is specified in the Analog Characteristics
specification table.
54
Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling cir-
cuits of the DAC.
55
Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling cir-
cuits of the ADC.
57, 58 Test In - This pin is an input used for test purposes only. It must be tied to ground for normal
59, 60 operation.
Interrupt (Output) - Signals either an ADC overflow condition has occurred in one or more of the
61 ADC inputs, or a clocking error has occurred in the DAC/ADC as specified in the Interrupt regis-
ter.
63 Serial Control Port Clock (Input) - Serial clock for the control port interface.
64 Serial Control Data I/O (Input/Output) - Input/Output for I²C data. Output for SPI data.
DS717F2
7