User’s Manual U15331EJ4V1UD
319
CHAPTER 19 FLASH MEMORY VERSION
The
µ
PD78F9488 is available as the flash memory version of the
µ
PD789488 (mask ROM version).
The
µ
PD78F9489 is available as the flash memory version of the
µ
PD789489 (mask ROM version).
The differences between the
µ
PD78F9488, 78F9489, and the mask ROM version are shown in Table 19-1.
Table 19-1. Differences Between
µ
PD78F9488, 78F9489, and Mask ROM Version
Flash Memory Version
Mask ROM Version
Item
µ
PD78F9488
µ
PD78F9489
µ
PD789488
µ
PD789489
ROM
32 KB (flash
memory)
48 KB (flash
memory)
32 KB
48 KB
Internal RAM
1024 bytes
1536 bytes
1024 bytes
1536 bytes
Internal memory
LCD display RAM
28
×
4 bits
Pin function selection
S16 to S27 (LCD segment output) or
P70 to P73 and P80 to P87 (general-
purpose ports)
Selectable by a port function register (PF7
and PF8) in bit units
Selectable by a mask option in bit
units
Circuit to multiply subsystem clock by
×
4
Use enabled/disabled by subclock select
register (SSCK)
Use enabled/disabled by a mask
option
Pull-up resistor of port 5
None
Selectable by a mask option in 1-bit
units
Remote controller receiver
Not provided Provided
Not
provided Provided
Key return signal detection pins
P00/KR0 to
P07/KR7
P00/KR00 to
P07/KR07,
P60/ANI0/KR10 to
P67/ANI7/KR17
P00/KR0 to
P07/KR7
P00/KR00 to
P07/KR07,
P60/ANI0/KR10 to
P67/ANI7/KR17
Restrictions in HALT mode when using
subclock
×
4 clock
Refer to
19.2 Cautions on
µ
PD78F9488
and
78F9489
None
IC0 pin
Not provided
Provided
V
PP
pin
Provided
Not Provided
Electrical specifications Refer
to
CHAPTER 22 ELECTRICAL SPECIFICATIONS (
µ
PD789488, 78F9488
,
789489, 78F9489)
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.
Содержание PD789488
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