Forum Post: Programming problem

Hi,

First ,sorry for my bad English.

When I try to program the CC8520, the PPWC shows Flash Erase Failed .  I check the ppw_programmer.log file,it shows:

Reset(doSpiReset=0, enterSpiLoader=1) -> ?
CmdReq(type=0x00, pParamData=0x0013B0D8, byteCount=4, pStatus=0x00000000) -> ?
    OK: CmdReq()
GetChipId(infoBlockOffset=0x00000000, pId=0x01EA60B8) -> ?
SpiTransaction(transType=0x0002, cmdType=0x001F, pStatus=0x00000000, pParamBuf=0x0013B0C0, numParamBytes=2, pDataBuf=0x01EA60B8, pNumDataBytes=0x0013B0BC)
    OK: SpiTransaction()
    OK: GetChipId() => nvmRev=FFFFFFFF, nvmSize=FFFFFFFF, chipId=2505
    OK: Reset()
GetChipId(infoBlockOffset=0x000000AC, pId=0x0013C14C) -> ?
SpiTransaction(transType=0x0002, cmdType=0x001F, pStatus=0x00000000, pParamBuf=0x0013C104, numParamBytes=2, pDataBuf=0x0013C14C, pNumDataBytes=0x0013C100)
    OK: SpiTransaction()
    OK: GetChipId() => nvmRev=FFFFFFFF, nvmSize=FFFFFFFF, chipId=2505
EraseFlash(mainBlock=1, infoBlock=0)
CmdReq(type=0x03, pParamData=0x0013C0F0, byteCount=4, pStatus=0x00000000) -> ?
    OK: CmdReq()
Timeout(timeoutUs=25000)
Nop(pStatus=0x0013C0EC) -> ?
    OK: Nop(*pStatus=0x0002)       "Mass erase in progress" mentioned in user guide , but I cannt understand what make this happened.

I set the power supply 2.8V  and I  checked the voltage of VDD AVDD IOVDD also 2.8V. please give me a hand .Thanks very much!