"The MAX6952 communicates through an SPI-compatible
4-wire serial interface. The interface has three
inputs, clock (CLK), chip select (CS), and data in (DIN),
and one output, data out (DOUT). CS must be low to
clock data into or out of the device, and DIN must be
stable when sampled on the rising edge of CLK. DOUT
is stable on the rising edge of CLK. Note that while the
SPI protocol expects DOUT to be high impedance
when the MAX6952 is not being accessed, DOUT on
the MAX6952 is never high impedance."
that's from the datasheet - so, you'll want to dig around some to find examples of SPI on the PIC ... some pics have a hardware module for handling synchronous serial communications (MSSP), this will make your life easier for talking to the SPI bus, but the timings can also be approximated using pure software as well.
after you get SPI going, the rest is just figuring out what commands to send and when to send them.