TI E2E Community
DLP & MEMS
New DLP Applications & Technology Forum
Interfacing with an external A2D board
I'm programming the APPSFPGA to interface with an external A2D board with an operating supply between 2.7V - 5.5V. I'm interested to use the J6 GPIO connector for the interface with a power supply of 3.3V.
The reference manual (2510455) says that it is a 2.5V connector, which is indeed what I see on the example FPGA code supplied by TI. However, I was wondering if there is a reason why I should avoid reprogramming the corresponding virtex5 pins to 3.3V?
Are you spinning your own board or planning to use the D4100 as is? I ask because the I/O have to be defined in groups and reference voltages supplied. I believe the kit board is already set up with 2.5 V I/Os so that it may not be as simple as redefining just the GPIO i/o pins.
Thanks for the quick response.
I am using the D4100. You are right, i forgot about the reference voltage which is grouped with the virtex GPI/O and is 2.5V.
In that case I assume the best solution will be to use voltage regulators on the external board. Is there anything else I should be aware of?
Beyond the need for all I/O's in a Virtex I/O bank to be defined with and be provided with the same voltage I am not aware of any. I am not sure how you will isolate the reference voltage signal traces on the D4100 board.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.