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Video controller IC for a CRT controller

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techie

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I want to display some graphic data (640 x 480) generated by a micorcontroller on a video monitor. Can someone suggest a suitable video controller IC.
 

6845 crt controller

You can try it:
**broken link removed**
or
**broken link removed**
 

6845 crt controller datasheet

But arenºt they LCD controllers. I need CRT controllers
 

hd46505 datasheet

S1D13806 is all-purpose controller, see data sheets.
 
crt controllers

Hi techie,
3 years ago I have finished a text on video Project ; my circuit was based on @tmel 89c51 uc ..the idea simply is to use a MUX to switch between video input and the selected input from your circuit " in my case it was a text and in your case it will be the graphic data". The problem was in synchronization . I mean how to know your position in the screen in the moment you switch the MUX ; To solve this problem i used the N@tional LM1881-X Video Sync Separator ; you can find its data sheet in this url :
h**p://www.national.com/pf/LM/LM1881.html
By this solution you don't need a special controller to do your function ;
I've got very good results for my project and I could control the text position in the screen and scroll my text as I want ...my future work was to make PIC on PIC but I didn't complete it ....
 

microcontroller crtc

But I need to generate a new signal for displaying on the CRT. The microcontroller is not fast enough to do that. I need a CRT controller chip.
 

6845 vhdl

Hello Techie,

You can use the MC6845 crt controller from Motorola. The part is obsolete now, but I'm shore that you can find a few pcs (if you don't need higher quantities). The part was also produced by Hitachi too. I have some datasheets in pdf, If you need it PM me.

rgds, Al
 

what is crt controller

Where can you buy the S1D13806? How much is it?

- Jayson
 

z80 crt controller

Thanks for mentioning MC6845. I had known this chip in early 80's but since then had forgotten about it. It maybe difficult to find now. Is there a later version now. Kind of strange that there is not much info avaialable about it. The CRT is still alive, so why are CRT controllers dead.
 

latest crt controller ic

www.national.com they have crt controlers (search in product tree) and they send samples too !
I tried to find 6845 replacements on the net, but it seems there arent any..
 

crt controller 6845

Kripton2035: which National product is like the Epson S1D13806?

- Jayson
 

microcontroller crt

6845 datasheets upped on MCU:
/ UsersFiles / AL / DataSheets

regards,Al
 

s1d13806

Cant open the link LechU. It leads to a blank page. Can you please check.
 

6845 fpga

For me works fine. Here are few lines copied from this page:

General purpose display controller

This is a simple display controller. It can be controlled with a small microcontroller, such as MCS51, 68HC11, Z80, AVR and others.
Several years ago, I found an article that controlling a TV with only a PIC micorcontroller, and I surprised to it. It is very interesting to attempt to synthesize video signal with a micorcontroller.
However, it is not suitable for practical use because the microcontroller is occupied in synthesizing video signal, it cannot process any other operation. Therefore, this technic can be applied to a toy at the best.
It is required a display controller to contorl the video display, so I designed and built a simple display controller for RGB monitor and TV monitor.

Hardware

Several years ago, I built a display controller which is same with discrete parts. However, the CRTC (HD46505 or equivalents) used to the display controller has been discontinued, so that it cannot be obtained.
Recently, some CPLD family, such as Xilinx, Altera and Lattice, are polular in Japanese electronics enthusiasts, so that I also tried to use the Xilinx XC9500 family to learn it and to reduce wiring cost.

Features

At the first time, it determined specifications in consideration of the generality.
The host interface is compatible with SRAM to be connected to most microcontroler directly. It might be connected to the memory socket on the board. For microcontroller which doesn't export the data bus, it can also control it with I/O ports.
Video output format is RGB with composite sync. It will be directly connected to junk CRT/LCD monitors. However, the junk RGB monitor is not that easy to obtain, so it have to be also connected to a TV.
The resolution of 320 by 240 dots is sufficient for video monitors smaller than several ins and TV because their resolution is low. When higher resolution is used, video data should be processed will be much (i.e., it requires faster processor and more memory space). Similarly, number of colors is 16 because it is not for natural picture.
As above trems, the specifications for this display controller is determined as follows:

Composed with: Only ordinaly parts because this is for experimental use.
Host interface: SRAM compatible interface to connect most microcontroller easily.
Screen mode: Full graphic display without character generator to increase display flexibility.
Resolution: 320 by 240, 4bit/pixel.
Video outputs: RGB with composite sync, S-Video and C-Video (Encoding for last two is NTSC).

Try to open main page: http://elm-chan.org and then try to find this project under "eleectronic handworks" - there is also an article in http://www.mcu.cz but in Czech language ...
 

6845 crt

Does anyone know of any other chips like the S1D13806 (SED1386) with similar functionality? I have tried finding places to buy this in small quantities without sucess :cry: The original press release for this chip mentions "competition" which makes me think that others similar to it must exist.

- Jayson
 

z80 connect to 6845

AL0117 said:
6845 datasheets upped on MCU:
/ UsersFiles / AL / DataSheets

regards,Al
HI, I NEED USE THE 6845 SO IF YOU CAN HELP ME WITH THE INFORMATION I REALLY THANK´S, PLEASE IF YOU NOW SOME CONNECTION SPECIFIC PLEASE SEND ME A REQUEST
 

interface microcontroller with crt display

For you information: I must to execute CRT controller board based in 6845, for HC11 microcontrollers. I'm working to a deadline March 2004

best regards
Wat
 

6845?? crt controller

why don't you use an FPGA? You can download VGA controller code from the web.


ASIC
 

avr microcontroller to monitor crt

FPGA circuits is a "black hole" in my electronic knowledge.

Wat
 

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