NEC switch - Manual (Page 190)

User’s Manual U12978EJ3V0UD
190
CHAPTER 14
µµµµPD78F9801
The
µPD78F9801 is a product that substitutes flash memory for the internal ROM of the mask ROM version. The
differences between the
µPD78F9801 and the mask ROM versions are shown in Table 14-1.
Table 14-1. Differences Between µµµµPD78F9801 and Mask ROM Versions
Item Flash Memory Version Mask ROM Version
µPD78F9801 µPD789800
Internal memory ROM 16 KB (Flash memory) 8 KB
High-speed RAM 256 bytes
IC pin Not provided Provided
V
PP
pin Provided Not provided
Electrical specifications Refer to CHAPTER 16 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.