I'm using MQX 4.1.1 and trying to connect to a SPI EEPROM by MK63 MCU. The part number of EEPROM I'm using is CAT25512HU5I−GT3. I use the spi example, but everytime I get wrong data when I try to read from EEPROM. I have detect the signals by oscilloscope. For the writing, it shows exactly what I transfer. However, when I read, it shows one-byte READ instruction with 16-bit address, but it always has an extra byte 0xFF sent out after the three bytes. Is it possible to be the problem in its driver?