Switch And Jumper Functions; Rotary Switch Settings - Analog Devices EVAL-ADAU1401EBZ User Manual

UG-072

SWITCH AND JUMPER FUNCTIONS

This evaluation board has many switches and jumpers; however,
for most applications, many of these need to be set only once
and can be ignored after that. Table 1 shows the function of
each jumper and switch on the evaluation board. For the S3
switch package, logic high (1) is left and logic low (0) is right,
assuming analog connectors are the top of the board.
Table 1. Switches and Jumpers
Reference
Designator Function
S1 Resets evaluation board.
S2 Signal routing mode select.
S3-1 Sets SELFBOOT.
S3-2 Sets PLL_MODE0.
S3-3 Sets PLL_MODE1.
S3-4 Sets ADDR0.
S3-5 Sets ADDR1.
S3-6 Reserved—set low.
2
S4 Sets I C or SPI connection to the ADAU1401.
S5 USBi control connector—I
S6 Selects between RCA and optical S/PDIF input.
S7 Unused.
S8 Unused.
LK1 to LK4 Selects which master clock signal is sent to the
PLL of the ADAU1401.
LK5 to LK6, Connects the DAC outputs to active (A) or passive
LK9 to LK14 (B) filters.
LK7 Sets the EEPROM write protect pin.
LK8 Selects 3.3 V or 5 V power connected to GPIO
control board.
LK15 Connects the 1.8 V output of the regulator
transistor to DVDD of the ADAU1401.
LK16 Connects/disconnects 12.288 MHz crystal from
oscillator circuit of the ADAU1401.
LK17 Connects/disconnects MCLK output to external
circuits. Connecting this may degrade the analog
audio performance of the board.
LK18 Connects 3.3 V to AVDD of the ADAU1401.
LK19 Writeback trigger input.
LK20 Connects 3.3 V to the
LK21 Connects 3.3 V to the IOVDD of the ADAU1401.
LK25 Connects 3.3 V power to serial data buffer.
1
Table 3. S2 Settings
SW2 Position SDATA_IN0
0 S/PDIF Rx
1 x
2 External Input 0
3 S/PDIF Rx
4 to F x
1
x = no signal is sent to the input pin.
2
C (left) or SPI (right).
AD8608 op amp.
SDATA_IN1 to SDATA_OUT0 to
SDATA_IN3 SDATA_OUT3
x External Output 0 to
External Output 3
x x
External Input 1 to External Output 0 to
External Input 3 External Output 3
x x
x x
Rev. 0 | Page 6 of 20
Evaluation Board User Guide

ROTARY SWITCH SETTINGS

S2 is a hex rotary switch that controls the input and output
signal routing on the evaluation board. The position of this
switch controls which serial data signals and clocks will be
routed to and from the ADAU1401. Table 3 shows the settings
of Rotary Switch S2. This switch controls the routing of digital
signals to and from the ADAU1701/ADAU1702
input and output ports. Table 3 indicates which serial data
signals and clocks are sent to each of the four serial data inputs,
as well as to where the output signals of the serial port are
routed. An x in the table indicates that no signal is sent to that
input pin on the ADAU1701/ ADAU1702 in that mode. Switch
Position 4 to Switch Position F are unused.
The functions in Table 2 are available for each of the modes in
Table 3.
Table 2. S2 Settings
Mode Function
0 Inputs: S/PDIF, analog
Outputs: S/PDIF, analog, serial data (slave)
1 Inputs: analog, serial data
Outputs: analog, serial data (master or slave)
2 Inputs: analog, serial data
Outputs: S/PDIF, analog, serial data (master)
3 Inputs: S/PDIF, analog
Outputs: analog
The multipurpose pins of the ADAU1401 must be set into serial
data I/O modes to use the board's digital I/O.
SPDIF Tx Clock Master
SDATA_OUT0 S/PDIF Rx
x ADAU1401 crystal oscillator
SDATA_OUT0 ADAU1401 output
x S/PDIF Rx
x x
(U1) serial