CS4270 Datasheet, PDF (7/48 Pages) Cirrus Logic – 24-Bit, 192 kHz Stereo Audio CODEC

CS4270
2. PIN DESCRIPTIONS - STAND-ALONE MODE
SDIN
1
LRCK
2
MCLK
3
SCLK
4
VD
5
DGND
6
SDOUT
7
VLC
8
M1
9
M0
10
I²S/LJ
11
MDIV1
12
24 ^MUTEB
23 ^AOUTB
22 ^AOUTA
21 ^MUTEA
20 ^AGND
19 ^VA
18 ^FILT+
17 ^VQ
16 ^AINB
15 ^AINA
14 ^RST
13 ^MDIV2
Pin Name
SDIN
LRCK
MCLK
SCLK
VD
DGND
SDOUT
(M/S)
VLC
M1
M0
I²S/LJ
MDIV1
MDIV2
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. This pin must be
pulled-up or pulled-down to select Master or Slave Mode.
8 Control Port Power (Input) - Determines the signal level for the control port.
9
10
Mode Selection (Input) - Determines the operational mode of the device.
11 ^{Serial Audio Interface Select (Input) - Selects either the left-justified orI²S format for the Serial Audio}
Interface.
12
13
MCLK Divide (Input) - Configures MCLK divider to divide by 1, 1.5, 2, or 4.
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 Characteris-
23 tics specification table.
DS686A1
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