
CHAPTER 28 ELECTRICAL SPECIFICATIONS
User’s Manual U19780EJ2V0UD
639
Caution The pins mounted depend on the product. Refer to Caution 2 at the beginning of this chapter.
DC Characteristics (5/5)
(T
A
=
−
40 to +85
°
C, 1.8 V
≤
V
DD
≤
5.5 V, AV
DD
≤
V
DD
, V
SS
= AV
SS
= 0 V)
Parameter Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Watchdog timer
operating current
I
WDT
Note 1
During 240 kHz internal low-speed oscillation clock
operation
5
10
μ
A
LVI operating current
I
LVI
Note 2
9
18
μ
A
AV
DD
= 5.0 V
1.7
3.4
mA
Normal mode 1
AV
DD
= 3.0 V
0.7
1.4
mA
Normal mode 2
AV
DD
= 2.3 V
0.5
1.2
mA
A/D converter
operating current
I
ADC
Note 3
During
conversion at
maximum
speed
Low-voltage mode
AV
DD
= 1.8 V
0.3
0.8
mA
Mode 1
25
37.5
μ
A
Mode 2
50
75
μ
A
Operational amplifier
operating current
I
AMP
Note 4
Mode 3
AV
DD
= 3.0 V
153
230
μ
A
V
DD
= 3.0 V
0.2
1.0
μ
A
RTC operating current
I
RTC
Note 5
f
SUB
= 32.768 kHz
V
DD
= 2.0 V
0.2
1.0
μ
A
Notes 1.
Current flowing only to the watchdog timer (including the operating current of the 240 kHz internal
oscillator). The current value of the 78K0/Kx2-A microcontrollers is the sum of I
DD1
, I
DD2
or I
DD3
and I
WDT
when the watchdog timer operates.
2.
Current flowing only to the LVI circuit. The current value of the 78K0/Kx2-A microcontrollers is the sum of
I
DD1
, I
DD2
or I
DD3
and I
LVI
when the LVI circuit operates.
3.
Current flowing only to the A/D converter (AV
DD
). The current value of the 78K0/Kx2-A microcontrollers is
the sum of I
DD1
or I
DD2
and I
ADC
when the A/D converter operates in an operation mode or the HALT mode.
4.
Current flowing only to the operational amplifier (AV
DD
). The current value of the 78K0/Kx2-A
microcontrollers is the sum of I
DD1
, I
DD2
, or I
DD3
and I
AMP
when the operational amplifier operates in an
operation mode, HALT mode, or STOP mode.
5.
Current flowing only to the real-time counter (excluding the operating current of the XT1 oscillator). The
current value of the 78K0/Kx2-A microcontrollers is the TYP. value, the sum of the TYP. values of either
I
DD1
or I
DD2
, and I
RTC
, when the real-time counter operates in operation mode or HALT mode. The I
DD1
and
I
DD2
MAX. values also include the real-time counter operating current.
Remarks 1.
f
XH
: High-speed system clock frequency (X1 clock oscillation frequency or external main system clock
frequency)
2.
f
RH
: Internal high-speed oscillation clock frequency
3.
f
SUB
: Subsystem clock frequency (XT1 clock oscillation frequency)