FB2 voltage(s)

[antron]

Hi,

Does anyone know what voltage level(s) is(are) available in a FB2?

Thanks in advance

Edited October 19, 2006 by antron

[Curt Vendel]

Depending on certain points you can access 3.3v and 5.0v Be careful not to bridge the voltage.

 

 

 

Curt

 

 

Hi,

Does anyone know what voltage level(s) is(are) available in a FB2?

Thanks in advance

[antron]

Thanks Curt.

Do you think it could drive this chip?

CXA1585Q RGB Decoder

 

I want to put a Flashback in my arcade cabinet.

[+batari]

Thanks Curt.

Do you think it could drive this chip?

CXA1585Q RGB Decoder

 

I want to put a Flashback in my arcade cabinet.

IIRC, the FB2 has a 7805 on it that can drive that chip and the FB2 with no problem. You may need to upgrade the wall wart, however, if yours came with a 200ma unit.

[Curt Vendel]

Nice chip, I did a project about 10yrs ago with a TDA3330, similar chip, yours has a LOT more capabilities to it though, I may have to try that out myself too...

 

 

Shouldn't be a problem at all powering it.

 

 

Curt

 

Thanks Curt.

Do you think it could drive this chip?

CXA1585Q RGB Decoder

 

I want to put a Flashback in my arcade cabinet.

[antron]

I am just now realizing how small the QZA1585Q is (7mm). I don't really have the equipment for this. Even if I found a 32 pin QFP socket to access it with, I am not seeing it for sale for less than $25 in small quantities.

 

The

TDA3562A

is DIP28 and goes for less than $7. But it looks like it will require a few more support components than the CXA1585Q and has a typical supply voltage of 10.8V.

 

Are seperate chroma and luma available on the Flashback 2.0?

Edited October 22, 2006 by antron

[supercat]

I wonder if there'd be other ways of generating RGB. Does the FB2 use a 3.58MHz crystal as its primary timebase, or does it use something faster and divide down? If you could generate three signals that were appropriately phased off the 3.58MHz clock you could probably construct a crude but effective RGB gizmo using discrete parts.