M37221 Mitsubishi, M37221 Datasheet - Page 56

• Manufacturer Part Number: M37221
• Description: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
• Manufacturer: Mitsubishi

56
PROM Programming Method
The built-in PROM of the One Time PROM version (blank) and built-
in EPROM version can be read or programmed with a general-pur-
pose PROM programmer using a special programming adapter.
The PROM of the One Time PROM version (blank) is not tested or
screened in the assembly process and following processes. To en-
sure proper operation after programming, the procedure shown in
Figure 65 is recommended to verify programming.
Fig. 65. Programming and testing of One Time PROM version
M37221EFSP
Caution : The screening temperature is far higher than
Product
the storage temperature. Never expose to
150°C exceeding 100 hours.
Functional check in target device
(150°C for 40 hours)
Screening (Caution)
PROM programmer
PROM programmer
Programming with
Verification with
Name of Programming Adapter
PCA7408
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
M37221EF-XXXSP,M37221EFSP
with ON-SCREEN DISPLAY CONTROLLER
MITSUBISHI MICROCOMPUTERS