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User Guide
USING THE EVALUATION BOARD
Table 7. DAC Output Interfaces and Signal (Continued)
Chip Number
Function
DAC14P
DAC15P
DAC16P
ADAU1861 (Differential)
HPOUTP
HPOUTN
Digital Microphone Inputs
One default external digital microphone (DMIC) interfaces on the
EVAL-ADAU1861EBZ, P20. Note that Pin 1, Pin 3, Pin 5, and Pin
7 of P44 are GND. Meanwhile, the external DMIC interface can
be transferred to 0.3 V using a level shifter (S7) by jumping JP31,
JP32, and JP38.
In addition, there is a DMIC array on board that is used to beam
form. DMIC_CLK_MP0 and JTAG TCK_MP22 can be chosen as
the DMIC clock input through JP30 and JP29.
Table 8. DMIC Interface
Function
DMIC_CLK_MP0
DMIC_CLK_MP0
DMIC01_MP1
DMIC01_MP2
PDM Outputs
The PDM output is P21, and its recommended setting is to use the
MP22 to MP25 pins as PDM outputs. Based on the level-shifter
switch, the power supply of the interface is 1.8 V or 3.3 V. In
addition, note that, Pin 1, Pin 3, Pin 5, and Pin 7 of P21 are GND.
If the P20, JP34, and JP37 jumpers are floating jumpers, the default
interface is JTAG.
analog.com
Pin Number and Px Value
Pin 2 of P11
Pin 3 of P15
Pin 2 of P15
Pin 2 of P13
Pin 3 of P13
Pin Number and Px Value
Pin 2 of P20
Pin 4 of P20
Pin 6 of P20
Pin 8 of P20
EVAL-ADAU1861
SERIAL AUDIO INTERFACE
2
Serial audio signals in I
S, left-justified, right-justified, and TDM
formats are available by the serial audio interface headers (P18 and
2
P19) to connect an external I
S- or TDM-compatible device. Based
on the level-shifter switch, the power supply of the interface is 1.8 V
or 3.3 V, and Pin 1, Pin 3, Pin 5, and Pin 7 of P18 and Pin 1, Pin 3,
Pin 5, and Pin 7 of P19 are all grounded.
Noticed that the serial audio port (I2S0) is connected to the
ADAU1966A by 0 Ω resistor R112, and the R113 and R114 resis-
tors are for audio tuning.
Table 9. Serial Audio Interface
Function
I2S0 Data In
I2S0 Data Out
I2S0 Frame Clock
I2S0 Bit Clock
I2S1 Data In
I2S1 Data Out
I2S1 Frame Clock
I2S1 Bit Clock
OTHER INTERFACES
Other interfaces include the following:
JTAG
►
UART
►
Flash
►
Multipurpose pin
►
The JTAG interface is P12. Use the mIDAS-Link emulator to com-
municate with the Tensilica HiFi 3z DSP core.
The UART interface is P17.
An on-board flash W25Q128JWEIQ -128 M bits interface is availa-
ble. Use JP12 to JP16 and JP21 to communicate with this flash
from the ADAU1861 by QSPI. In addition, use JP17 to JP20 to
communicate with this flash from the SPI. P16 is also included to
connect an external flash, if required.
Note that all multipurpose pins (MP0 to MP25) are used to config-
ure a variety of other functions, such as PDM, general-purpose
input and output (GPIO), DMIC, and so on.
Pin Number and Px Value
Pin 2 of P18
Pin 4 of P18
Pin 6 of P18
Pin 8 of P18
Pin 2 of P19
Pin 4 of P19
Pin 6 of P19
Pin 8 of P19
Rev. 0 | 11 of 24
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