DECA User Manual
27
www.terasic.com
May 22, 2015
Figure 3-18 Connections between the FPGA and audio CODEC
Table 3-10 Pin Assignment of Audio CODEC
Signal Name
FPGA Pin
No.
Description
I/O Standard
AUDIO_MCLK
PIN_P14 Master output Clock
1.5V
AUDIO_BCLK
PIN_R14 Audio serial data bus (primary) bit clock
1.5V
AUDIO_WCLK
PIN_R15 Audio serial data bus (primary) word clock
1.5V
AUDIO_DIN_MFP1
PIN_P15
Audio serial data bus data output/digital microphone
output
1.5V
AUDIO_DOUT_MFP2 PIN_P18 Audio serial data bus data input/general purpose input 1.5V
AUDIO_SCLK_MFP3 PIN_P19 SPI serial Clock/headphone-detect output
1.5V
AUDIO_SCL_SS_n
PIN_P20 I2C Clock/SPI interface mode chip-select signal
1.5V
AUDIO_SDA_MOSI
PIN_P21 I2C Data/SPI interface mode serial data output
1.5V
AUDIO_MISO_MFP4
PIN_N21 Serial data input/General purpose input
1.5V
AUDIO_SPI_SELECT PIN_N22 Control mode select pin
1.5V
AUDIO_RESET_n
PIN_M21 Reset signal
1.5V
AUDIO_GPIO_MFP5
PIN_M22 General Purpose digital IO/CLKOUT input
1.5V
3.4.5
T
T
w
w
o
o
A
A
n
n
a
a
l
l
o
o
g
g
I
I
n
n
p
p
u
u
t
t
S
S
M
M
A
A
C
C
o
o
n
n
n
n
e
e
c
c
t
t
o
o
r
r
s
s
The DECA board implements two analog input SMA connectors. The analog inputs are amplified
and translated by Texas Instruments INA159 gain of 0.2 level translation difference amplifier, then
the amplifier’s outputs are fed to dedicated single-ended analog input pins for MAX 10 build-in