
MB90340E Series
56
(3) Power On Reset
(T
A
=
40
°
C to
+
105
°
C, V
CC
=
5.0 V
±
10
%
, f
CP
≤
24 MHz, V
SS
=
AV
SS
=
0.0 V)
Value
(4) Clock Output Timing
(T
A
=
40
°
C to
+
105
°
C, V
CC
=
5.0 V
±
10
%
, V
SS
=
0.0 V, f
CP
≤
24 MHz)
Value
Unit
Min
Max
ns
41.76
ns
20
ns
13
ns
Parameter
Symbol
Pin
Condition
Unit
Remarks
Min
Max
Power on rise time
t
R
V
CC
0.05
30
ms
Power off time
t
OFF
V
CC
1
ms
Due to repetitive operation
Parameter
Symbol
Pin
Condition
Remarks
Cycle time
t
CYC
CLK
62.5
f
CP
=
16 MHz
f
CP
=
24 MHz
f
CP
=
16 MHz
f
CP
=
24 MHz
CLK
↑
→
CLK
↓
t
CHCL
CLK
V
CC
V
CC
V
SS
3 V
t
R
t
OFF
2.7 V
0.2 V
0.2 V
0.2 V
Holds RAM data
If you change the power supply voltage too rapidly, a power on reset may occur.
We recommend that you startup smoothly by restraining voltages when changing
the power supply voltage during operation, as shown in the figure below. Perform
while not using the PLL clock. However, if voltage drops are within 1 V/s, you can
operate while using the PLL clock.
We recommend a rise of
50 mV/ms maximum.
CLK
2.4 V
t
CYC
2.4 V
0.8 V
t
CHCL