PD78F0066_15 Datasheet, PDF (11/30 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78F0066
1. DIFFERENCES BETWEEN µPD78F0066 AND MASK ROM VERSIONS
The µPD78F0066 is a product provided with a flash memory that enables on-board writing, erasing, and rewriting
of programs with the device mounted on the target system. The functions of the µPD78F0066 (except the functions
specified for flash memory) can be made the same as those of the mask ROM versions by setting the memory
size switching register (IMS).
Table 1-1 shows the differences between the flash memory version (µPD78F0066) and the mask ROM version
(µPD780065).
Table 1-1. Differences between µPD78F0066 and Mask ROM Version
Item
Internal ROM structure
Internal ROM capacity
IC pin
VPP pin
µPD78F0066
Flash memory
48 Kbytes^Note
Not provided
Provided
Mask ROM Version
Mask ROM
40 Kbytes
Provided
Not provided
Note Flash memory capacity can be set to 40 Kbytes or 48 Kbytes by the memory size switching register (IMS).
Caution
There are differences in noise immunity and noise radiation between the flash memory and
mask ROM versions. When pre-producing an application set with the flash memory version
and then mass-producing it with the mask ROM version, be sure to conduct sufficient
evaluations for the commercial samples (not engineering samples) of the mask ROM version.
Preliminary Product Information
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