User’s Manual U15075EJ1V0UM00
291
CHAPTER 17
µµµµ
PD78F9436, 78F9456
The
µ
PD78F9436 and 78F9456 are available as the flash memory versions of the
µ
PD789426, 789436, 789446,
and 789456 Subseries.
The
µ
PD78F9436 is a version with the internal ROM of the
µ
PD789426 and 789436 Subseries replaced with flash
memory and the
µ
PD78F9456 is a version with the internal ROM of the
µ
PD789446 and 789456 Subseries replaced
with flash memory. The differences between the
µ
PD78F9436, 78F9456 and the mask ROM versions are shown in
Table 17-1.
Table 17-1. Differences Between
µµµµ
PD78F9436, 78F9456 and Mask ROM Versions
Flash Memory Version
Mask ROM Version
Part Number
Item
µ
PD78F9436
µ
PD78F9456
µ
PD789425,
789435
µ
PD789426,
789436
µ
PD789445,
789455
µ
PD789446,
789456
ROM
12 KB
16 KB
12 KB
16 KB
12 KB
16 KB
High-speed RAM
512 bytes
Internal
memory
LCD display RAM 5 bytes
15 bytes
5 bytes
15 bytes
IC pin
Not provided
Provided
V
PP
pin
Provided
Not provided
Electrical specifications
Varies depending on flash memory or mask ROM versions.
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.
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