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MITSUBISHI MICROCOMPUTERS
38C8 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
DATA REQUIRED FOR MASK ORDERS
The following are necessary when ordering a mask ROM produc-
tion:
1. Mask ROM Order Confirmation Form✽1
2. Mark Specification Form✽2
3. Data to be written to ROM, in EPROM form (three identical copies)
or one floppy disk.
For the mask ROM confirmation and the mark specifications, refer to
the “Mitsubishi MCU Technical Information” Homepage.
✽1 Mask ROM Confirmation Forms
http://www.infomicom.mesc.co.jp/38000/38ordere.htm
✽2 Mark Specification Forms
http://www.infomicom.mesc.co.jp/mela/markform.htm
ROM PROGRAMMING METHOD
The built-in PROM of the blank One Time PROM version and built-in
EPROM version can be read or programmed with a general-purpose
PROM programmer using a special programming adapter
(PCA7447FP).
The PROM of the blank One Time PROM version is not tested or
screened in the assembly process and following processes. To en-
sure proper operation after programming, the procedure shown in
Figure 40 is recommended to verify programming.
Programming with PROM
programmer
Screening (Caution)
(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. 40 Programming and testing of One Time PROM version
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