Evaluation Board User Guide UG-072
Rev. A | Page 9 of 20
USING THE GPIO BOARD
The GPIO board is provided with the EVA L -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
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
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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