Hi Anil,

I found the same problem when I tried to let PIC16C73A work as
SPI slave with MC68HC11, the PIC16C73A only support two
modes of SPI. If you want to use all 4 modes of SPI, like what you
have done on 68HC11, the PIC16C76 is good choice. It is pin-compatible
with 73a, but the price much higher.

Anyway, if you find the solution of the 73a's SSP, I will be happy to
see it.

Jerry

At 12:04 AM 9/19/97 -0700, you wrote:
>I have been using software bit toggling to interface with a LTC1298 A/D
> converter.
>I'd like to be able to use the SSP (in SPI mode) port instead of the bit
> toggling.
>
>According to the '1298 data sheets, it symchronizes transfer with each bit
being
> transmitted on the falling edge of SCK anfd captured on the rising edge
of SCK
> for both transmitting and receiiving.
>
>As far as I can tell, the PIC SSP will on transmit on rising and latch on
> falling SCK  It seems if you invert this behavior with CKP=1, then you still
> can't get the behavior that the '1298 expects.
>
>I've done this on a 68HC11 SPI and it talks fine with the '1298.  However,
the
> HC11 allwows both control of the clock polarity as well as the xmit/recv
phase.
>
>Any insight would be much appreciated.
>
>Thanks
>--Anil
>
>

Jerry Meng, BA1FB

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http://www.qsl.net/ba1fb