MC68HC705P9 Datasheet, PDF (30/156 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Memory _EPROM/OTPROM
CAUTION:
Turn off the V_PP power supply before turning off the V_DD power supply.
11. Turn off the V_DD power supply.
EPROM Erasing
The erased state of an EPROM bit is zero. Erase the EPROM by
exposing it to 15 Ws/cm² of ultraviolet light with a wavelength of 2537
angstroms. Position the ultraviolet light source one inch from the
EPROM. Do not use a shortwave filter.
Cerdip packages have a transparent window for erasing the EPROM
with ultraviolet light. In the windowless PDIP and SOIC packages, the
2104 EPROM bytes function as one-time programmable ROM
(OTPROM).
12-mc68hc705p9
30
Memory
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