Search found 15 matches

by JimDrew
Tue 2019-03-12 0:43
Forum: VS23S010 Forum
Topic: 8 bit parallel mode
Replies: 5
Views: 86

Re: 8 bit parallel mode

The SPI clock speed is limited compared to what the parallel lines will handle. So, I guess it depends on what CPU you are interfacing to the VS23S010-D. For me, I wanted the fastest method and SPI (even QSPI) was not the way to go.
by JimDrew
Mon 2019-03-11 8:57
Forum: VS23S010 Forum
Topic: 8 bit parallel mode
Replies: 5
Views: 86

Re: 8 bit parallel mode

I am using a dsPIC33 interfaced the VS23S010-D. With this chip you might notice that some of the parallel lines are also part of the SPI lines. For the dsPIC33 I am able to remap pins so I don't have to bit-bang the SPI. I just change what the pin use is for and the hardware SPI of the chip works fi...
by JimDrew
Thu 2017-06-29 20:35
Forum: VS23S010 Forum
Topic: Nice color palettes for VS23S010 TV-Out
Replies: 12
Views: 4913

Re: Nice color palettes for VS23S010 TV-Out

Hello Panu!

I can confirm that the new version corrects the palette editor's generation of data! This is a great program, making it really easy to pick YUV colors to match RGB requirements.

Thanks again for your hard work on this!
by JimDrew
Fri 2016-04-01 18:49
Forum: VS23S010 Forum
Topic: Interfacing the VS23S010 chip with an Atmega1284 Micro Controller
Replies: 10
Views: 4965

Re: Interfacing the VS23S010 chip with an Atmega1284 Micro Controller

Panu, by connecting the parallel port you automatically get 2 of the 3 lines of the SPI bus! I am using 13 lines total: 8 for parallel port (which also includes SDO and SDI), SCK, XCS, XCSPAR, XWR, and RESET. I will look at adding the BLOCKMOVE0 pin to the shield. However, you don't need this pin to...
by JimDrew
Fri 2016-04-01 1:27
Forum: VS23S010 Forum
Topic: Interfacing the VS23S010 chip with an Atmega1284 Micro Controller
Replies: 10
Views: 4965

Re: Interfacing the VS23S010 chip with an Atmega1284 Micro Controller

Neslou, I have quite a lot of experience now with the VS23S010 chip. I have it interfaced to a PIC24 using both the SPI and 8 bit parallel ports. Panu has been a great help in figuring out the ins and outs of this chip. The one thing that is not documented in simple terms is that this chip is a vide...
by JimDrew
Mon 2016-02-15 23:47
Forum: VS23S010 Forum
Topic: Nice color palettes for VS23S010 TV-Out
Replies: 12
Views: 4913

Re: Nice color palettes for VS23S010 TV-Out

Looks great. I will check it out.
by JimDrew
Tue 2016-02-09 19:08
Forum: VS23S010 Forum
Topic: Nice color palettes for VS23S010 TV-Out
Replies: 12
Views: 4913

Re: Nice color palettes for VS23S010

This is by far, the best explanation of your microcode engine. You need to put this text in your datasheet.

It seems to me that you should be able to use this microcode engine to do a pretty close 256 color RGB conversion to YUV.
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by JimDrew
Sun 2016-02-07 1:04
Forum: VS23S010 Forum
Topic: NTSC Video Example
Replies: 13
Views: 4503

Re: NTSC Video Example

Perhaps a real world example would be helpful for those looking at this chip. I would like to recommend explaining exactly what is necessary for generating the standard SMPTE NTSC color bars test pattern. Showing the setup of the chip, and the contents of the SRAM should be very easy to follow. Most...
by JimDrew
Wed 2016-02-03 3:29
Forum: VS23S010 Forum
Topic: NTSC Video Example
Replies: 13
Views: 4503

Re: NTSC Video Example

Thanks for your answers! You should consider having a 14.31318MHz input with a 2x PLL option. That is a common oscillator, and more importantly, it is available in 2520 and 3250 package sizes. A 3.579545MHz oscillator is extremely rare in a small package. It's even worse if you are using a crystal i...
by JimDrew
Tue 2016-02-02 23:28
Forum: VS23S010 Forum
Topic: NTSC Video Example
Replies: 13
Views: 4503

Re: NTSC Video Example

We could also publish the VS23S010 Display Daughterboard for VS1005 Developer Board schematics, although that is not the simplest possible implementation. Yes, please post this schematic. Also, what voltage/current requirement is there on VXTALIN if driving this line from an external source (like a...