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Flash Programmer Model TFP2 User’s Manual
If the TFP2 cannot communicate with the target board, a “Command Timeout” message appears.
Possible reasons for a Command Timeout indication upon programming the target board:
1. Power not provided to target board preventing TFP2 communication with target board.
2. Bad cable connecting TFP2 to target board preventing TFP2 communication with target board.
3. Malfunctioning target board preventing TFP2 communication with target board.
4. TFP2 Programmers built before June 2011 may have timing issues with some 78M66xx devices.
Contact Teridian for further information.
NOTE: The TFP2 must be powered first before connecting the target board to the TFP2 .
NOTE: The target’s watchdog timer must be enabled (V1 pin not connected to
V3P3) and the target’s ICE_E pin must be connected to the appropriate
TFP2 connector pin for target flash re-programming if the target’s security
bit is set.
NOTE: Wrong Memory Size switch setting will result in a Verification Error FAIL message .
2.4 PREVIOUSLY PROGRAMMED DEVICE VERIFICATION
A previously programmed device can be checked against the currently loaded image contained in the
TFP2. Use the “C” command to perform this comparison. The green LEDs are illuminated if the flash
contents of the device in the socket match the contents of the TFP2 EEPROMs.
Figure 2-13: Previously Programmed Device Check
If the security bit is set, the target’s FLASH memory cannot be read. Therefore, the Compare results will
fail as shown below. The red LEDs are illuminated indicating this condition.
Figure 2-14: Previously Programmed Device Check with Security Bit Set
Revision 2.3
14 of 36
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