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User’s Manual U15075EJ2V1UD
294
CHAPTER 17
µ
PD78F9436, 78F9456
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
µ
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
×
4 bits
15
×
4 bits
5
×
4 bits
15
×
4 bits
IC pin
Not provided
Provided
V
PP
pin
Provided
Not provided
Electrical specifications Refer
to
CHAPTER 20 ELECTRICAL SPECIFICATIONS
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.