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Flash Programmer Model TFP2 User’s Manual
EERPOM. The running CRC calculated during the file download is compared to the embedded CRCs of
the individual byte records within the hex file for appropriate PASS and FAIL indication. Additionally, the
appropriate green or red LED is illuminated. The TFP2 EEPROM checksum calculation value is based
on the memory size switch setting and is displayed for future reference. The download transfer times
may vary from 15 minutes to 1 minute for a 64 KB file size. The Microsoft ? Windows 2000 Service Pak 4
or later affords the faster download time.
Figure 2-8: TFP2 Download Complete
Possible reasons for a FAIL indication upon downloading a file to the TFP2:
1. Downloaded file not Intel Hex format.
2. USB to RS-232 dongle communication problem (increase Line delay to 10 msec.).
3. USB to RS-232 dongle does not support XON/OFF.
4. XON/XOFF protocol failure, close and restart Hyper-Terminal.
5. Hex file not converted using the CHKSUM.EXE utility.
6. The following messages appear when the Memory Size Switch setting is too small for the
downloaded file.
Figure 2-9: TFP2 Download Fail due to Incorrect Memory Size Setting
Revision 2.3
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