Fujitsu F2MC-16LX Hardware Manual page 470
Mb90550a/b series, 16-bit
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Also See for F2MC-16LX:
- Hardware manual (706 pages) ,
- Application note (13 pages) ,
- Operation manual (10 pages)
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APPENDIX C Programming the OTPROM
(3)
Set MB90P553A in the adapter socket. Mount the adapter socket on the EPROM
programmer. In this case, note the device and adapter socket directions.
(4)
Program the OTPROM.
Notes:
• The mask ROM products (MB90553A/B and MB90552A/B) do not support EPROM mode
and, therefore, cannot be read by the EPROM programmer.
• When purchasing the EPROM programmer, contact the appropriate marketing department.
■ Programming Mode
The default status of all bits of MB90P553A is "1". To set information, selectively program a
desired bit with "0". A value of 1 cannot be written electronically.
■ Screening Conditions Recommended for the OTPROM
For a product not provided with the OTPROM microcontroller program, high-temperature aging
is recommended as the screening method before installation.
■ OTPROM Programming Yield
For a program not provided with the OTPROM microcontroller program, a programming test on
all bits cannot be carried out. Therefore, the programming yield may not always be 100 percent.
454
Figure C-2 Screening Conditions Recommended for the OTPROM
Program, verify
High-temperature aging
+150
Read
Mount
C
, 48 h
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