How about using a parallel eeprom on the PIC? This should give fast
enough access time, but require a PIC with enough pins to drive the
address & data buses

Alternatively, you may be able to interleave access to the eeprom with
the radio comms, i.e. when you have received the first address byte,
send it to the eeprom while receiving the second. Maybe you could even
interleave on a bit-by-bit basis for minimum delay.=20
 Using a 25xx series SPI eeprom will make this a LOT easier as the
protocol is much simpler, and faster than I2C. If speed is a major
issue to make this work, a PIC with SPI would make it even faster.=20

>No PIC has such amount of internal EEPROM thus I tried to use an =
external
>24C64 on a second I2C bus. While the PIC accesses the 24C64 it keeps the=
 SCL
>line (to the radio) low to force the radio's computer into wait states. =
This
>is fine according to I2C specification, but the radio doesn't like it.
>
>Time for my questions....
>
>A. Is there any PIC that has 8KByte of internal EEPROM? (just in case I
>missed it)
>B. If not, is there any other uC which does? (apart from the H8) =
which...
>    1. I can't easily source in UK
>    2. Hitachi still hasn't send me the datasheet after several emails =
and
>two months waiting.
>    3. No fee development tools are on the Internet.
>
>Any other suggestions are welcome. Have a look at my web page
>www.model-gadgets.com
>
>Many thanks for reading.
>
>-Angelos

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