>Hello all,
>
>1.I have 2 pieces of 1Mbyte serial flash memory with built in SRAM and
>SPI Interface

What chip ?

>and I would like to connect it to the PIC16F84. Since the PIC16F84 has
>no built in SPI Interface, I was wondering if it possible to write a
>software driver for it, similar to the available IIC routine.

See 16x84+ 93Cxx applications, I hope its ease to adapt them to your chip.

>Has anybody done something like this?
>I would be happy for any suggestions or code examples on this issue.
>
>2.Can somebody recommend a good 16bit ad converter with SPI Interface
>and 3V operating voltage?
>The sampling rate doesn4t matter since it is a low frequency
>application.

You really need 16bit ? I use AD7896, it is only 12bit but very goooooood !
Look at AD7715, I have very short description, but it says that this chip is
+3/+5v, 80uA, 16-pin (I hope 16bit ADC in 16pin package is not parallel :-).
Its faxcode=1813 and you may download the full pdf-file from www.analog.com



>
>Best Regards,
>Thomas