Enclosed is my PIC asm source to access a
Ramtron FM25160 FRAM SPI serial memory.  

Data In and Data Out Lines have been tied together 
to save pins, but can be separated.  

Wiring is as declared in the source, which can be changed:
  #define  RAM_CHIP_SELECT    PORTA, 0
  #define  RAM_DATA_IN        PORTA, 1
  #define  RAM_DATA_OUT       PORTA, 1
  #define  RAM_CLOCK          PORTA, 2

The functions are as follows:
RAMInit       - must be called once to initialize system
RAMStop       - complete a read or write operation
RAMWriteStart - start a sequenced write at RAMAddress
RAMWrite      - send a sequenced byte (w) to the chip
RAMWriteByte  - Write a single byte (w) to RAMAddress
RAMReadStart  - start a sequenced read at RAMAddress
RAMRead       - receive a sequenced byte from the chip into w
RAMReadByte   - Read a single byte from RAMAddress in w

To write a series of data:
  Setup RAMAddress
  call  RAMWriteStart
  movlw  <data>
  call  RAMWrite    - repeat last 2 for each byte
  call  RAMStop

To read a single byte:
  Setup RAMAddress
  call  RAMReadByte

To Setup RAMAddress, move the low 8 bits to RAMAddressLow
and the high 3 bits to RAMAddressHigh<2..0> (the bottom 3 bits)

Contributed by Byon Garrabrant, N6BG,  byon@mail.com   Aug 5, 1999

**********************************************************************
* This software is  available only for non-commercial  amateur radio *
* or educational  applications.   ALL  other  uses  are  prohibited. * 
* This  software may  be  modified  only  if the  resulting code  be *
* made available  publicly  and the  original  author given  credit. * 
* Contact the author or TAPR for information on commercial licenses. *
* (c) Copyright 1999,  Byon Garrabrant,  N6BG.  All rights reserved. *
**********************************************************************