Multipurpose (Mp) Pins - Analog Devices EVAL-ADAU1466Z User Manual

UG-1135
Table 3. Mapping of SigmaStudio
Output Jack Plug Contact
J10 Left (tip)
J10 Right (ring)
J8 Left (tip)
J8 Right (ring)
J6 Left (tip)
J6 Right (ring)
J5 Left (tip)
J5 Right (ring)
Standard headers with 0.1 inch (2.54 mm) spacing, provide
connections from external sources. The J2 and J3 headers each
comprise two columns and three rows of pins. There is one
signal column and one ground column. Always connect at least
one ground wire between the header and the external signal
source to maintain proper signal integrity. A standard ribbon
cable provides signal integrity over longer distances because
signal wires are separated by ground wires (see Figure 63).
Figure 63. Connecting External I
The signals passing between the
and the AD1938 DAC are also accessible via the test points that
are situated between the two ICs. Signals can be tapped from
these test points and connected to external digital audio sinks, if
desired (see Figure 64). When connecting these signals to external
devices, connect at least one ground signal to maintain signal
integrity.
Channels to Output Jacks
AD1938 DAC Pin ADAU1466
OL1 SDATA_OUT0
OR1 SDATA_OUT0
OL2 SDATA_OUT1
OR2 SDATA_OUT1
OL3 SDATA_OUT2
OR3 SDATA_OUT2
OL4 SDATA_OUT3
OR4 SDATA_OUT3
2 S Signals to Serial Input Port 2
ADAU1466 serial output ports
Rev. 0 | Page 20 of 45
EVAL-ADAU1466Z
Serial Output Pin Output Channel in
0
1
16
17
32
33
40
41
Figure 64. Test Points for Monitoring Digital Audio Signals

MULTIPURPOSE (MP) PINS

The multipurpose pins on the
purpose inputs or outputs when configured as such using the
ADAU1466 control registers. Of the 14 multipurpose pins, three
are connected to switches that pull them low or tie them high,
three are on test points and connected to high impedance inputs
to LED drivers, and two are available headers. The remaining
six pins are used for other functionality and are, therefore,
unavailable for use as multipurpose pins.
The signal from the LRCLK_OUT1/MP5 pin is fed to an inverter
that drives LED D4. The signal from the LRCLK_OUT3/MP9 pin
is fed to an inverter that drives LED D3. The signal from the
LRCLK_IN1/MP11 pin is fed to an inverter that drives LED D5.
The five multipurpose pins available for use as general-purpose
inputs or outputs, along with their access points on the evaluation
board, are described in Table 4.
User Guide
SigmaStudio
ADAU1466 can be used for general-