ADP28 EETools, ADP28 Datasheet - Page 27

• Manufacturer Part Number: ADP28
• Description: Programming Socket Adapters & Emulators EEROM 8U ADAPTER 28-PIN PLCC PACKAGE
• Manufacturer: EETools
• Type: EeRom-8U Adapter/EPROMr

Specifications of ADP28

• Description/function: Programmer Accessories EEROM-8U Adapter 28-Pin PLCC Package
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

EeRom-8U User’s Guide
I. TROUBLESHOOTING
Regardless of the symptom, verify the following:
1.
2.
3.
Verifies, but target does not run
Target not being reset
If the wrong reset output is being used or it is connected to the wrong spot on the
target, it may not be resetting the target during the download. We would get a good
download, but the target was fetching garbage during the transfer. Some processors
will HALT, others will simply execute the random garbage they received.
event, the processor will not “know” to start over and execute the new code.
Try removing the reset line, turning off the target power for 10 seconds and then
turning the power back on. If the target now comes up and runs, the reset signal
connection was wrong. While you could do this after each load, we highly recommend
correcting the reset problem to make resets automatic and to prevent the target from
running garbage during the download.
Emulator device size set wrong.
The device SIZE configuration affects only the TARGET’S view of the emulator. The file
will download and verify correctly as long as the emulator is large enough to hold the
file. If the size is set too small, the target will not be able to access the entire file
image. For example, if the file is 60,000 bytes long, it would load into an EeRom-8U
and verify properly. However if the emulator is configured to emulate a 27256, the
target would see only the first 32Kbytes mirrored into both halves of the 64KByte
space.
27256 and plugged it into the same socket.
There are no “dongles”, security keys, switch boxes or other devices between the
EeRom-8U download cable and the USB port.
The target is powered up.
All download, daisy-chain and target interface cables are tight and fully inserted.
This is exactly what would happen if you burned the first 32Kbytes into a
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In either