ASIC with RAM

I think this guy is looking for a single board computer or development system.

Nomination: This months "What the heck is this about?" award.

Why? Do you mean an actual ASIC, which would typically be in volumes of millions, completely custom, or would something generic work?

That would be something like this:

-although you most likely don't know what you're asking.

I think, it should be completely custom.

I imagine the chip should contain:

keyboard interface which can buffer 128 character from IBM PC keyboard in the SRAM

I/O to 8bit CPU

is it possible to have 64KB of SRAM in ASIC, I'm not sure about that.

anyway thanks in advance Padmow

Ian Stirl> > Greetings,

least

Nice on such details, but you have not said what it is supposed to do.

Why create an ASIC? The PC keyboard signals are easely handled by a microcontroller or a DSP. You can still get a single chip solution.

this is connected to a microprocessor. so we can have 2 chip solution.

There are DSPs with 256kB. The problem is finding one in a small package with flash and the amount of RAM you want. I recommend looking at Texas Intruments and Analog Devices. How much speed do you think you need?

when the external Microprocessor accessing the RAM, I would prefer it is done by pure hardware. faster and simpler I think

Padmow

Nico Coesel wrote:

solution.

looking

Cheaper, if you're building a hundred thousand. Not faster, unless you need 100s of MB/second maybe simpler. Otherwise, it's going to be cheaper to either go discrete, or to pick a general purpose micro that's got enough internal RAM.