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EEPROM versions in the
µ
The
PD78E9860A replaces the internal ROM of the
µ
internal ROM of the
PD789861 with EEPROM. The differences between the
mask ROM versions are shown in Table 17-1.
Table 17-1. Differences Between
Item
Internal
Program
memory
memory
Data
memory
System clock
IC pin
V
pin
PP
P40 to P43 pull-up resistor by mask
option
POC circuit selection by mask option
Oscillation stabilization time after STOP
mode is released by interrupt request
Oscillation stabilization time after STOP
mode release by RESET or reset
release via POC circuit
Power supply voltage (V
)
DD
Electrical specifications
Caution There are differences in noise immunity and noise radiation between the EEPROM and mask
ROM versions. When pre-producing an application set with the EEPROM 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.
CHAPTER 17
µ
PD789860, 789861 Subseries include the
µ
PD78E9860A, 78E9861A and Mask ROM Versions
Part Number
EEPROM Versions
µ
PD78E9860A
ROM
EEPROM
structure
ROM
4 KB
capacity
High-speed
128 bytes
RAM
EEPROM
32 bytes
Ceramic/crystal
oscillation
Not provided
Provided
Not provided
Not provided
12
Can select 2
15
17
2
/f
, or 2
/f
X
X
OSTS register
15
2
/f
X
1.8 to 5.5 V
Refer to CHAPTER 20 ELECTRICAL SPECIFICATIONS
User's Manual U14826EJ5V0UD
µ
PD78E9860A, 78E9861A
µ
PD78E9860A and 78E9861A.
µ
PD789860 with EEPROM. The
µ
PD78E9861A
RC oscillation
7
/f
,
2
/f
X
CC
by
7
2
/f
CC
1.8 to 3.6 V
µ
PD78E9861A replaces the
µ
PD78E9860A, 78E9861A and the
Mask ROM Versions
µ
µ
PD789860
PD789861
Mask ROM
Ceramic/crystal
RC oscillation
oscillation
Provided
Not provided
Provided
Provided
12
7
Can select 2
/f
,
2
/f
X
CC
15
17
2
/f
, or 2
/f
by
X
X
OSTS register
15
7
Can select 2
/f
2
/f
X
CC
17
or 2
/f
by mask
X
option
1.8 to 5.5 V
1.8 to 3.6 V
159
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