CS4270_06 Datasheet, PDF (6/49 Pages) Cirrus Logic – 24-Bit, 192 kHz Stereo Audio CODEC

CS4270
1. PIN DESCRIPTIONS - SOFTWARE MODE
SDIN
1
24
LRCK
2
23
MCLK
3
22
SCLK
4
21
VD
5
20
DGND
6
19
SDOUT
7
18
VLC
8
17
SDA/CDOUT
9
16
SCL/CCLK
10
15
AD0/CS
11
14
AD1/CDIN
12
13
MUTEB
AOUTB
AOUTA
MUTEA
AGND
VA
FILT+
VQ
AINB
AINA
RST
AD2
Pin Name
SDIN
LRCK
MCLK
SCLK
VD
DGND
SDOUT
VLC
SDA/CDOUT
SCL/CCLK
AD0/CS
AD1/CDIN
AD2
RST
AINA
AINB
VQ
FILT+
VA
AGND
MUTEA
MUTEB
AOUTA
AOUTB
#
Pin Description
1 Serial Audio Data Input (Input) - Input for two’s complement serial audio data.
2
Left Right Clock (Input/Output) - Determines which channel, Left or Right, is currently active on the
serial audio data line.
3 Master Clock (Input) - Clock source for the delta-sigma modulator and digital filters.
4 Serial Clock (Input/Output) - Serial clock for the serial audio interface.
5 Digital Power (Input) - Positive power supply for the digital section.
6 Digital Ground (Input) - Ground reference for the internal digital section.
7 Serial Audio Data Output (Output) - Output for two’s complement serial audio data.
8 Control Port Power (Input) - Determines the signal level for the Control Port.
9
Serial Control Data (Input/Output) - SDA is a data I/O in I²C^® Mode. CDOUT is the output data line for
the Control Port interface in SPI^® Mode.
10 Serial Control Port Clock (Input) - Serial clock for the serial Control Port.
11
Address Bit 0 (I²C) / Control Port Chip Select (SPI) (Input) - AD0 is a chip address pin in I²C Mode.
CS is the chip select signal for SPI format.
12
Address Bit 1 (I²C) / Serial Control Data (Input) - AD1 is a chip address pin in I²C Mode. CDIN is the
input data line for the Control Port interface in SPI Mode.
13 Address Bit 2 (I²C) (Input) - AD2 is a chip address pin in I²C Mode.
14 Reset (Input) - The device enters a low power mode when low.
15 Analog Input (Input) - The full-scale analog input level is specified in the ADC Analog Characteristics
16 specification table.
17 Quiescent Voltage (Output) - Filter connection for internal quiescent voltage.
18 Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling circuits.
19 Analog Power (Input) - Positive power for the analog sections.
20 Analog Ground (Input) - Ground reference. Must be connected to analog ground.
21 Mute Control (Output) - Each pin is active during power-up initialization, reset, muting, when master
24 clock to left/right clock frequency ratio is incorrect, or power-down.
22 Analog Audio Output (Output) - The full-scale output level is specified in the DAC Analog Character-
23 istics specification table.
6
DS686PP1