Evaluation Board User Guide
UG-072
Rev. A | Page 9 of 20
USING THE GPIO BOARD
The GPIO board is provided with the EVAL-ADAU1401AEBZ
to connect control and data interfaces to the multipurpose pins
of the ADAU1401A. These controls are broken out on a
separate board from the main evaluation board so that different
configurations beyond what is supplied can be easily connected.
The functions on this board include potentiometers, LEDs,
push buttons, switches, and a rotary encoder.
Table 8 shows how the jumpers should be set to properly route
the controls to the ADAU1401A’s MPx pins. The settings in
Table 8 assume that the board is oriented with a 50-pin
connector, J1, on the left of the board.
The 12 jumpers, J3 to J14, should be left on the pins to connect
the MPx pins to the control interfaces. These jumpers should be
removed if the GPIO board is being used to interface serial
audio data to the ADAU1401A through Header J2 and Header
J3. JP1 and JP2 are used to route the serial data ports’ master
clock signals.
The GPIO board uses a Hirose PCN10C-50S-2.54DS connector
to interface to the ADAU1401A evaluation board. Using this
connector and the pinout in Figure 10, any set of controls can
be connected to the multipurpose pins of the ADAU1401A. The
GPIO board is powered through Pin 1 of J12 on the evaluation
board. The voltage supplied to the GPIO board is set with
LK8—3.3 V in Position A or 5.0 V in Position B.
Table 8. GPIO Board Jumper Settings and Functions
ADAU1401A Pin
Jumper Control Routed to MPx Pin
Jumper Setting
Notes
MP0
JP9
LED D20
Left
Push Button S10
Right
Use debounce, signal low on button press
MP1
JP10
LED D21
Left
Push Button S11
Right
Use debounce, signal low on button press
MP2
JP11
Rotary encoder
Left
Must be set to input GPIO, no debounce
Potentiometer R28
Right
Read ADC value from Register 0x080A
MP3
JP12
Rotary encoder
Left
Must be set to input GPIO, no debounce
Potentiometer R30
Right
Read ADC value from Register 0x080B
MP4
JP13
Switch S12
Left
Push Button S13
Right
Use debounce, signal low on button press
MP5
JP14
Switch S14
Left
Push Button S14
Right
Use debounce, signal low on button press
MP6
JP8
Push Button S7
Left
Use debounce, signal low on button press
Switch S8
Right
MP7
JP7
Push Button S5
Left
Use debounce, signal low on button press
Switch S6
Right
MP8
JP6
Potentiometer R4
Left
Read ADC value from Register 0x080C
LED D2
Right
MP9
JP5
Potentiometer R3
Left
Read ADC value from Register 0x0809
LED D1
Right
MP10
JP4
Push-button S3
Left
Use debounce, signal low on button press
Switch S4
Right
MP11
JP3
Push Button S1
Left
Use debounce, signal low on button press
Switch S2
Right
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