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PROM Programming Examples
Key-in Sequence
As part of the programming routine, the iUP-201A universal programmer per
forms a blankcheck of the new PROM to verify that it can be programmed. When
programming is complete, it performs the verify function to check that the pro
gramming was done correctly.
Note that the blankcheck routine generally happens so fast that the message
"BLANKCK" is flashed momentarily. Also, the message "PROGRAMMING"
blinks to indicate that programming is in progress. PROM programming can last
several minutes.
If the iUP-201A universal programmer discovers that the PROM to be pro
grammed is not blank, it displays a blankcheck error message such as the following:
The address of the byte that is not blank is displayed.
The fact that the PROM is not blank does not necessarily mean it cannot be
programmed. Pressing the PROG key again causes the iUP-201A universal pro
grammer to perform a stuck bit routine to check if the non-blank bits correspond
with bits in the RAM. If the routine indicates that the PROM can be programmed
successfully, the programming routine is initiated automatically. Here is an exam
ple of programming a non-blank PROM.
4-4
/---------------------------------------------------------
BLANKCK
COMMAND
V
/ ■ — -------------------------------------------------------
PROGRAMMI NG
COMMAND
END V E R I F Y
COMMAND
BLANKCK ERR
COMMAND
V
|
ADDRESS
|
DATA
|
ADDRESS
|
DATA
CKSUM
DTAB
ADDRESS
DATA
□ □ □ I F A
DATA
|
ADDRESS
|
iUP-200A/201A
s
>
----- N
/
A
3C
J
0875
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