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twlostow / dsi-shield

Arduino MIPI DSI Shield
GNU Lesser General Public License v3.0
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Voltage on FPGA pin <PROGRAM_B_2> in Schematic main.sch #2

Closed ghost closed 9 years ago

ghost commented 9 years ago

hi Tomasz Thanks for sharing this very interesting & good design

maybe not an important issue , but according to the Spartan6 Configuration specs (UG380.PDF) on page 42 for "FPGA SPI Configuration Interface" it says the Spartan-6 FPGA VCCO_2 supply must be the same voltage as VCC of the SPI device

so in the dsi-shield schematic , maybe it should be connected to 3V3 instead of 2V5 ? (but anyway i guess it works also with 2V5 , but simply fyi about the official Xilinx specs)

Thanks again for sharing this project

ghost commented 9 years ago

in fact some Xilinx boards have the SPI device with VCC 3V0 , and the VCCO_2 to +2.5V so i guess it is OK with the FPGA pin connected to +2.5V (even if the UG380 does mention a different recommendation)

sorry for opening the issue : your design is CORRECT : so this issue can be CLOSED Thanks