ADAU1442/ADAU1445/ADAU1446
Data Sheet
Rev. D | Page 14 of 92
Pin No.
Mnemonic
Description
34
MP6
D_IO
Multipurpose, General-Purpose Input/Output. When not used, this pin can be left disconnected.
35
MP5
D_IO
Multipurpose, General-Purpose Input/Output. When not used, this pin can be left disconnected.
36
MP4
D_IO
Multipurpose, General-Purpose Input/Output. When not used, this pin can be left disconnected.
40
VDRIVE
A_OUT
Regulator Drive. Supplies the drive current for the 1.8 V regulator. The base of the voltage regulator’s
external PNP transistor is driven from VDRIVE.
41
XTALO
A_OUT
Crystal Oscillator Output. A 100 damping resistor should be connected between this pin and the
crystal. This output should not be used to directly drive a clock to another IC; the CLKOUT pin
exists for this purpose. If the crystal oscillator is not used, the XTALO pin can be left unconnected.
42
XTALI
A_IN
external master clock, this pin should be connected to the master clock signal generated by another IC.
43
PLL_FILT
A_OUT
Phase-Locked Loop Filter. Two capacitors and a resistor must be connected to this pin as shown in
44
PVDD
PWR
Phase-Locked Loop Supply. Provides the 3.3 V power supply for the PLL. This should be decoupled
to PGND with a100 nF capacitor.
45
PGND
PWR
Phase-Locked Loop Ground. Ground for the PLL supply. The AGND, DGND, and PGND pins can be
tied directly together in a common ground plane. PGND should be decoupled to PVDD with a
100 nF capacitor.
46
SPDIFI
D_IN
S/PDIF Input. Accepts digital audio data in the S/PDIF format. When not used, this pin can be left
disconnected.
47
SPDIFO
D_OUT
S/PDIF Output. Outputs digital audio data in the S/PDIF format. When not used, this pin can be left
disconnected.
48
AVDD
PWR
Analog Supply. 3.3 V analog supply for the auxiliary ADC. This pin should be decoupled to AGND
with a 100 nF capacitor.
49
AGND
PWR
Analog Ground. Ground for the analog supply. This pin should be decoupled to AVDD with a
100 nF capacitor.
53
CLKOUT
D_OUT
Master Clock Output. Used to output a master clock to other ICs in the system. Set using the
CLKMODEx pins. When not used, this pin can be left disconnected.
54
RESET
D_IN
Reset. Active-low reset input. Reset is triggered on a high-to-low edge and exited on a low-to-high
event sets all RAMs and registers to their default values.
55
MP3/ADC3
D_IO,
A_IN
Multipurpose, General-Purpose Input or Output/Auxiliary ADC Input 3. When not used, this pin can
be left disconnected.
56
MP2/ADC2
D_IO,
A_IN
Multipurpose, General-Purpose Input or Output/Auxiliary ADC Input 2. When not used, this pin can
be left disconnected.
57
MP1/ADC1
D_IO,
A_IN
Multipurpose, General-Purpose Input or Output/Auxiliary ADC Input 1. When not used, this pin can
be left disconnected.
58
MP0/ADC0
D_IO,
A_IN
Multipurpose, General-Purpose IO/Auxiliary ADC Input 0. When not used, this pin can be left
disconnected.
59
PLL1
D_IN
Phase-Locked Loop Mode Select Pin 1.
60
PLL0
D_IN
Phase-Locked Loop Mode Select Pin 0.
61
SDATA_OUT8
D_OUT
Serial Data Port 0 Output. When not used, this pin can be left disconnected.
64
BCLK11
D_IO
Bit Clock, Output Clock Domain 11. This pin is bidirectional, with the direction depending on
whether the Output Clock Domain 11 is set up as a master or slave. When not used, this pin can
be left disconnected.
65
LRCLK11
D_IO
Frame Clock, Output Clock Domain 11. This pin is bidirectional, with the direction depending on
whether the Output Clock Domain 11 is set up as a master or slave. When not used, this pin can be
left disconnected.