CS42438_06 Datasheet, PDF (9/62 Pages) Cirrus Logic – 108 dB, 192 kHz 6-in, 8-out TDM CODEC

2. PIN DESCRIPTIONS - HARDWARE MODE
CS42438
AIN5_MUX
AIN6_MUX
MFREQ
ADC3_HPF
RST
VLC
FS
VD
DGND
VLS
SCLK
MCLK
ADC_SDOUT/
ADC3_SINGLE
52 51 50 49 48 47 46 45 44 43 42 41 40
1
39
2
38
3
37
4
36
5
35
6
7
42438
34
33
8
32
9
31
10
30
11
29
12
28
13
27
14 15 16 17 18 19 20 21 22 23 24 25 26
AIN1+
AIN1-
VA
VQ
AGND
AOUT8-
AOUT8+
AOUT7+
AOUT7-
AOUT6-
AOUT6+
AOUT5+
AOUT5-
Pin Name
AIN5_MUX
AIN6_MUX
MFREQ
ADC3_HPF
RST
VLC
FS
VD
VLS
SCLK
ADC_SDOUT/
ADC3_SINGLE
DAC_SDIN
AUX_LRCK
#
Pin Description
1 Analog Input Multiplexer (Input) - Allows selection between the A and B single-ended inputs of
2 ADC3. See Section 7.6.7 and 7.6.8 for details.
3
MCLK Frequency (Input) - Sets the required frequency range of the input Master Clock. See
Section 5.4 for the appropriate settings.
ADC3 High-Pass Filter Freeze (Input) - When this pin is driven high, the internal high-pass filter
4 will be disabled for ADC3. The current DC offset value will be frozen and continue to be sub-
tracted from the conversion result. See “ADC Digital Filter Characteristics” on page 16.
5
Reset (Input) - The device enters a low-power mode and all internal registers are reset to their
default settings when low.
6
Control Port Power (Input) - Determines the required signal level for the control port interface.
See “Digital I/O Pin Characteristics” on page 8.
7 Frame Sync (Input) - Signals the start of a new TDM frame in the TDM digital interface format.
8 Digital Power (Input) - Positive power supply for the digital section.
10
Serial Port Interface Power (Input) - Determines the required signal level for the serial port inter-
faces.
11 Serial Clock (Input) - Serial clock for the serial audio interface. Input frequency must be 256 x Fs.
13
Serial Audio Data Output (Output) - TDM output for two’s complement serial audio data. Start-
up Option for Hardware Mode: Pull-up to VLS enables Single-Ended Mode for AIN5-AIN6.
14 DAC Serial Audio Data Input (Input) - Input for two’s complement serial audio data.
15
Auxiliary Left/Right Clock (Output) - Determines which channel, Left or Right, is currently active
on the Auxiliary serial audio data line.
DS646F1
9