For a school project using the Nexys 4 DDR I need to input audio from a single ended source (voltage+ground). This can be either directly from a guitar (1Vp-p) or the headphone output of a iPod Nano (2Vp-p). The Nexys 4 reference does not indicate how the Artix-7 JXADC differential inputs are configured, whether unipolar or bipolar mode. From the Xilinx doc "7 Series FPGAs and Zynq-7000 All programmable SoC XADC Dual 12-Bit 1 MSPS Analog-to-Digital Converter" it appears bipolar would be needed with the analog source voltage connected to a ADnP and the ground connected to ADnN. The desired output is 12-bit signed as either audio source is a 0DC with positive and negative values.
Can I do this with the CON4 PMOD connected directly to one of the Nexus 4 DDR PMOD ports or must I use a AD1/AD2 PMOD (with a CON4 PMOD connected to the AD1/AD2 input)?
Question
John Martin
For a school project using the Nexys 4 DDR I need to input audio from a single ended source (voltage+ground). This can be either directly from a guitar (1Vp-p) or the headphone output of a iPod Nano (2Vp-p). The Nexys 4 reference does not indicate how the Artix-7 JXADC differential inputs are configured, whether unipolar or bipolar mode. From the Xilinx doc "7 Series FPGAs and Zynq-7000 All programmable SoC XADC Dual 12-Bit 1 MSPS Analog-to-Digital Converter" it appears bipolar would be needed with the analog source voltage connected to a ADnP and the ground connected to ADnN. The desired output is 12-bit signed as either audio source is a 0DC with positive and negative values.
Can I do this with the CON4 PMOD connected directly to one of the Nexus 4 DDR PMOD ports or must I use a AD1/AD2 PMOD (with a CON4 PMOD connected to the AD1/AD2 input)?
Link to comment
Share on other sites
4 answers to this question
Recommended Posts
Archived
This topic is now archived and is closed to further replies.