APPENDIX D Programming PROM
Figure D.1-4 shows the screening flowchart.
Figure D.1-4 Screening Flowchart
Program, verify
High-temp. aging
+ 150 ˚ C, 48 Hrs.
Read data
Assembly
Programming Yield
All bits cannot be programmed at Fujitsu shipping test to a blanked one-time PROM
microcomputer, due to its nature. For this reason, a programming yield of 100% cannot be
assured at all times.
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