26-04-2019, 03:27 PM
Terry
C47 is my bad. In the PCB software to move a component from the top side of the PCB to the bottom or visa versa you "Flip" it. You can use the same command on text which gives a mirror image of the text without changing which side of the PCB it is on. Looks like I inadvertently flipped "C47"
This PCB went wrong in a few ways. There is no silk screen on the bottom of the board.
I did a design rule check on the PCB which reported everything OK and shortly afterwards generated the Gerber files. In that short time two via's got moved close to a near by track and caused a short. I wouldn't mind but I took my time with it if I didn't it probably would have went better.
None of the problems are major. To remove the short on the track just requires running a scalpel blade beside it. I had discovered the short before the PCB arrived.
Jeffrey
The PLL's in the Cyclone IV are more capable than the ones in Cyclone II. There are two in the EP4CE6E. One uses the 27 MHz video clock to produce the 625 and 405 clocks as in Hedghog.
The other uses the 50 MHz clock and produces 14.31818 for the video decoder, 4 MHz for the modulators and a 210 MHz clock that I can run the test card off when in test mode.
To program the Flash I use indirect programming, so it gets programmed via the FPGA using a .jic file. That is the same way I program the FPGA board in Hedghog.
The Altera programmer recognises a IS25LP016D-JNLE-TR as if it were a EPCS16. I believe that other flash devices can be used but a check that the programmer does has to be disabled first. You could also use the newer EPCQ16 which costs less than the EPCS16 but this would require a different programming file with the boot loader changed to suit the EPCQ16.
I believe that Cyclone II can use similar SPI devices.
Frank
C47 is my bad. In the PCB software to move a component from the top side of the PCB to the bottom or visa versa you "Flip" it. You can use the same command on text which gives a mirror image of the text without changing which side of the PCB it is on. Looks like I inadvertently flipped "C47"
This PCB went wrong in a few ways. There is no silk screen on the bottom of the board.
I did a design rule check on the PCB which reported everything OK and shortly afterwards generated the Gerber files. In that short time two via's got moved close to a near by track and caused a short. I wouldn't mind but I took my time with it if I didn't it probably would have went better.
None of the problems are major. To remove the short on the track just requires running a scalpel blade beside it. I had discovered the short before the PCB arrived.
Jeffrey
The PLL's in the Cyclone IV are more capable than the ones in Cyclone II. There are two in the EP4CE6E. One uses the 27 MHz video clock to produce the 625 and 405 clocks as in Hedghog.
The other uses the 50 MHz clock and produces 14.31818 for the video decoder, 4 MHz for the modulators and a 210 MHz clock that I can run the test card off when in test mode.
To program the Flash I use indirect programming, so it gets programmed via the FPGA using a .jic file. That is the same way I program the FPGA board in Hedghog.
The Altera programmer recognises a IS25LP016D-JNLE-TR as if it were a EPCS16. I believe that other flash devices can be used but a check that the programmer does has to be disabled first. You could also use the newer EPCQ16 which costs less than the EPCS16 but this would require a different programming file with the boot loader changed to suit the EPCQ16.
I believe that Cyclone II can use similar SPI devices.
Frank
