Lpc2000

This is from the LPC2106 errata sheet:

         SPI.1Unintentional clearing of SPI interrupt flagIntroduction:
The SPI interrupt flag is set by the SPI interface to generate an interrupt. It is cleared by writing a 1 to this bit.
         Problem:A write to any register associated with the SPI peripheral will clear the SPI interrupt register.
         work-around:Avoid writing to SPI registers while transmissions are in progress or while SPI interrupts are pending