4280 Datasheet, PDF (41/48 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS

MITSUBISHI MICROCOMPUTERS
4280 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS
(6) Notes on handling
ΠA high-voltage is used for writing. Take care that overvoltage
is not applied. Take care especially at turning on the power.
 For the M34280E1FP/GP, Mitsubishi Electric corp. does
not perform PROM writing test and screening in the
assembly process and following processes. In order to
improve reliability after writing, performing writing and test
according to the flow shown in Figure 31 before using is
recommended.
Writing with PROM programmer
Screening (Leave at 150 °C for 40 hours) (Note)
Verify test with PROM programmer
Function test in target device
Note: Since the screening temperature is higher
than storage temperature, never expose the
microcomputer to 150 °C exceeding 100
hours.
Fig. 31 Flow of writing and test of the product shipped in
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