2 PIN DESCRIPTIONS - HARDWARE MODE
52 51 50 49 48 47 46 45 44 43 42 41 40
AIN5_MUX
AIN6_MUX
AIN1+
AIN1-
39
38
1
2
VA
MFREQ
3
37
36
35
34
33
ADC3_HPF
VQ
4
AGND
AOUT8-
AOUT8+
AOUT7+
AOUT7-
AOUT6-
AOUT6+
AOUT5+
RST
VLC
5
6
CS42438
FS
7
VD
8
32
31
30
29
28
27
DGND
VLS
9
10
11
12
SCLK
MCLK
ADC_SDOUT/
ADC3_SINGLE
AOUT5-
13
14 15 16 17 18 19 20 21 22 23 24 25 26
Pin Name
#
Pin Description
AIN5_MUX
AIN6_MUX
1
2
Analog Input Multiplexer (Input) - Allows selection between the A and B single-ended inputs of
ADC3. See sections 7.6.7 and 7.6.8 for details.
3
MCLK Frequency (Input) - Sets the required frequency range of the input Master Clock. See sec-
tion 5.4 for the appropriate settings.
MFREQ
4
ADC3 High-Pass Filter Freeze (Input) - When this pin is driven high, the internal high-pass filter
will be disabled for ADC3.The current DC offset value will be frozen and continue to be subtracted
from the conversion result. See “ADC Digital Filter Characteristics” on page 15.
ADC3_HPF
RST
VLC
5
6
Reset (Input) - The device enters a low power mode and all internal registers are reset to their
default settings when low.
Control Port Power (Input) - Determines the required signal level for the control port interface.
See “Digital I/O Pin Characteristics” on page 7.
FS
7
8
Frame Sync (Input) - Signals the start of a new TDM frame in the TDM digital interface format.
Digital Power (Input) - Positive power supply for the digital section.
VD
VLS
10 Serial Port Interface Power (Input) - Determines the required signal level for the serial port inter-
faces.
SCLK
11
Serial Clock (Input) - Serial clock for the serial audio interface. Input frequency must be 256xFs.
ADC_SDOUT/
ADC3_SINGLE
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.
DAC_SDIN
AUX_LRCK
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.
8
DS646PP2
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