Search found 31 matches

by wfriedrich
Fri 2021-08-06 18:50
Forum: VS23S010 Forum
Topic: VS23S040 Guide?
Replies: 3
Views: 2002

Re: VS23S040 Guide?

My understanding is, the VS23S040 is basically 4x VS23S010D. So the guide is still valid. There is 4 bit in a control register that selects which channel is active for read/write access (reg B7h Video&Registers Block Selection register). Memory is not shared between the channels, so the resoluti...
by wfriedrich
Mon 2021-07-19 2:55
Forum: VS23S010 Forum
Topic: Multiple VS23S010 chips connected together.
Replies: 6
Views: 1223

Re: Multiple VS23S010 chips connected together.

Thanks for the explanation. Now it all makes sense. :D
by wfriedrich
Tue 2021-07-13 3:18
Forum: VS23S010 Forum
Topic: Multiple VS23S010 chips connected together.
Replies: 6
Views: 1223

Re: Multiple VS23S010 chips connected together.

Thanks for confirming that there would be no difference for the software.
I have no trouble with the layout, my Arduino shield with the CS23S040 works flawlessly.

That "simple and neat" code is a handful to understand for a hardware person like me. :?
by wfriedrich
Tue 2021-07-13 3:09
Forum: VS23S010 Forum
Topic: Colour Match: Background to Frame
Replies: 2
Views: 725

Re: Colour Match: Background to Frame

Hello Hannu,
Thanks for the explanation, I think it makes sense.
I am going to try this with and without added black level on my good colour monitor soon and report back.
- Wolfgang.
by wfriedrich
Sat 2021-07-10 3:09
Forum: VS23S010 Forum
Topic: Colour Match: Background to Frame
Replies: 2
Views: 725

Colour Match: Background to Frame

Hello VLSI team, I am trying to match the colour of my usable image background (default colour of all pixels) with the frame around the image (defined by the protoline). I am using NTSC 320x200 with the attached 8bit palette, which is YUV422. Palette.png And the desired colour is the dark blue, circ...
by wfriedrich
Sat 2021-07-10 0:50
Forum: VS23S010 Forum
Topic: Multiple VS23S010 chips connected together.
Replies: 6
Views: 1223

Re: Multiple VS23S010 chips connected together.

Hello Hannu,
What would be the difference between this circuit and a VS23S040 chip? Could I use the same code to access either of those?
Thanks,
- Wolfgang.
by wfriedrich
Mon 2020-08-10 3:00
Forum: VS23S010 Forum
Topic: Protoline voltage levels
Replies: 2
Views: 2969

Re: Protoline voltage levels

Hello Panu, Thanks for the information, as usual super helpful and gives a lot of insights into the chip. There might be a slight miss-understanding with my schematic. It is basically a dual purpose, I want to use it either as 4x composite video output, R16 and the load resistor R28 and all the comp...
by wfriedrich
Thu 2020-07-30 3:04
Forum: VS23S010 Forum
Topic: Protoline voltage levels
Replies: 2
Views: 2969

Protoline voltage levels

Hello Panu and team, Is it possible to select more than 3 voltage levels in a protoline during the non-picture period. I understand how to create blank-level, black-level and sync-level. if I add another value, will it just create one more voltage step? E.g. 0x0000 for sync, 0x0037 for blank, 0x0042...
by wfriedrich
Sat 2020-03-21 23:18
Forum: VS23S010 Forum
Topic: VS23S010 and VGA monitor
Replies: 14
Views: 16795

Re: VS23S010 and VGA monitor

Challenge accepted! 8-) And it is done. https://cdn.hackaday.io/images/5481571584825012268.jpg I made a board as a Arduino Shield/Feather Wing, that should be able to output VGA or 4* Composite video. As @Panu suggested, soldering was amazingly easy. I use some low-temperature solder paste and a bo...
by wfriedrich
Fri 2019-03-22 1:42
Forum: VS23S010 Forum
Topic: A few VS23S040 questions
Replies: 9
Views: 7509

Re: A few VS23S040 questions

Hello Panu and jockm,
Very interesting discussion.
Side question to #3:
Is the PLL in the VS23S010 and VS23S040 identical? If I have a stable VGA demo (single colour or grey scale) on my VS23S010 Arduino shield, would it transfer 1-to-1 to the S040?
Thanks,
- Wolfgang.