User`s manual

PCA7412x-xxx User’s Manual 3． (Action in Case of an Error) Troubleshooting
3
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Troubleshooting (Action in Case of an Error)
Be sure to check the following before seeking technical support.
3.1 Errors That Occur When Writing to PROM
3.1.1 When Newly Purchased
Cause Check point See page
Is the adapter attached to the correct position of the PROM
programmer?
13
Is the switch on the adapter set correctly? 14
Programming
adapter
Is the MCU attached to the correct position?
15
Is the area specification set correctly? 17
PROM programmer
Is the correct device selected?
18
Contact failure
The IC socket of the PROM programmer may be stained.
The socket needs replacing.
-
3.1.2 Previously Written Normally
Cause Check point See page
Is the adapter attached to the correct position of the PROM
programmer?
13
Is the switch on the adapter set correctly? 14
Programming
adapter
Is the MCU attached to the correct position?
15
Is the area specification set correctly? 17
PROM programmer
Is the correct device selected?
18
The IC socket of the PROM programmer may be stained.
The socket needs replacing.
-
Contact failure
The connector with which the PROM programmer contacts may be
stained. Clean it with alcohol, etc.
-
3.1.3 MCU Does Not Function Normally
In the case that the program operates normally on the emulator, but when the MCU that has normally been written is attached
the same program does not function normally:
(1) Is the offset address specified correctly when copying data into the PROM programmer?
(2) In the emulator, NOPs are often inserted in the area where the program has not been read, therefore the program
happens to appear functioning normally even though it may have gone wild. Check your program again.
(3) The emulator and the actual MCU may differ in characteristics. Consult the user's manual of the emulator to check for
differences in characteristics again.
CAUTION
Caution to Be Taken for Mass Programming
This product is a development supporting unit for use in your program development and evaluation stages.
Therefore, it is not designed for mass-programming in mass production.
Increased frequency of use causes programming failure due to the wear-out or dirt, etc. on the following parts:
(1) Wear-out or dirt on the contact in the IC socket of this product
(2) Wear-out or dirt on the contact of the PROM programmer’s socket
Replacing the PROM programmer’s socket may ease the problem.
R20UT0274EJ0200 Rev.2.00 Page 19 of 24
Oct 16, 2010