actually I am using ST3234A, it contains two flashes(main flash and second flash). ST uses second flash as boot rom, but it only has 32K space, I need another 32K space. I defined one page of main flash as CODE SPACE, The address is from 8000 to FFFF. In the assembly code, I put some codes in 8000h, I use LJMP command jump to 8000h, the code didn't run, so I am thinking that although I defined one page of Main Flash as code space, it acted as data space. I don't know why, I sent the email to ST FAE, but I haven't got any respone back.
Any idea from you guys?

Thanks.
Frank