56F803 and external data memory

[hapqt]

I'm using SDK2.4 for DSP56F803.I want to erase,write and read the data from external data memory(SST39VF1601) through the data and address bus.But the returned data always 0xFFFF.Is there any error?

  ORC #$0008,OMR
  NOP
  MOVE #$AA,X:$5555
  MOVE #$55,X:$2AAA
  MOVE #$A0,X:$5555
  MOVE #$0E,X:$0024
  NOP

  NOP
  MOVE X:$0024,A
  NOP
  ANDC #$FFF7,OMR
  NOP
  MOVE A,Data
  NOP  

THANKS.Another problem:can I see the data in the external data memory by the codeworrior windows?

[JerryLe]

why not change sdk to Codewarrior 8.0 with PE?

[hapqt]

Please help me.Thank you very much.