M38203M4 Datasheet, PDF (294/344 Pages) Mitsubishi Electric Semiconductor – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPENDIX
3.1 Built-in PROM version
(3) One Time PROM version
sNotes on setting the PROM programmer area
qFor products shipped in blank, access to the first 128 bytes and addresses FFFE16 and FFFF16 in
the built-in PROM user area is inhibited.
Note the above point when setting the PROM programmer area.
sNotes before actual use
The programming test and screening for PROM of the One Time PROM version (shipped in blank) are
not performed in the assembly process and the following processes. To ensure reliability after pro-
gramming, performing programming and test according to the Figure 3.1.5 before actual use are
recommended.
Programming with PROM programmer
Screening (Caution)
(Leave at 150 °C for 40 hours)
Verification with PROM programmer
Functional check in target device
Caution: The screening temperature is far higher than the
storage temperature. Never expose to 150°C
exceeding 100 hours.
Fig. 3.1.5 Programming and testing of One Time PROM version (shipped in blank)
3–10
3820 GROUP USER’S MANUAL