Preliminary User’s Manual U16315EJ1V0UD
384
CHAPTER 25
µµµµ
PD78F0124
The
µ
PD78F0124 is provided as the flash memory version of the 78K0/KD1 Series.
The
µ
PD78F0124 replaces the internal mask ROM of the
µ
PD780124 with flash memory to which a program can
be written, erased, and overwritten while mounted on the board. Table 25-1 lists the differences between the
µ
PD78F0124 and the mask ROM versions.
Table 25-1. Differences Between
µµµµ
PD78F0124 and Mask ROM Versions
Item
µ
PD78F0124
Mask ROM Versions
Internal ROM configuration
Flash memory
Mask ROM
Internal ROM capacity
32 KB
Note
µ
PD780121: 8 KB
µ
PD780122: 16 KB
µ
PD780123: 24 KB
µ
PD780124: 32 KB
Internal high-speed RAM capacity
1024 bytes
Note
µ
PD780121: 512 bytes
µ
PD780122: 512 bytes
µ
PD780123: 1024 bytes
µ
PD780124: 1024 bytes
IC pin
None
Available
V
PP
pin
Available
None
Electrical specifications
Refer to
CHAPTER 27 ELECTRICAL SPECIFICATIONS (TARGET VALUES)
.
Note
The same capacity as the mask ROM versions can be specified by means of the internal 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 versions.