External Memory Capabilities of the HC12

Hello,

I am relatively new to the 68HC12 (about 5 months) and I'm using it in
a
project that I've been working on. I know that the 68HC12 has an
external
addressing scheme that will allow one to reach 1MBytes worth of data.
My
question is this:

What types of external memories are available? I have found an I2C
1Mbit
EEPROM and some SPI flash memories, but nothing near 1MBytes that I
would be
able to use.

Please provide some direction if you are familiar with this.

Thanks,

Zach

<zachjacobs@gmail.com> wrote in message
news:1163653159.636016.101090@m73g2000cwd.googlegroups.com...
> Hello,
>
> I am relatively new to the 68HC12 (about 5 months) and I'm using it in
> a
> project that I've been working on. I know that the 68HC12 has an
> external
> addressing scheme that will allow one to reach 1MBytes worth of data.
> My
> question is this:
>
> What types of external memories are available? I have found an I2C
> 1Mbit
> EEPROM and some SPI flash memories, but nothing near 1MBytes that I
> would be
> able to use.
>
> Please provide some direction if you are familiar with this.
>
> Thanks,
>
> Zach
>

The external bus on the HC12 is a parallel bus, so you must use
parallel memory devices, not serial ones.  You likely will need either
8 or 16bit wide memory.

Mike