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Main Clock Oscillator Characteristics
(1) Crystal resonator, ceramic resonator (T
Recommended Circuit
Parameter
Oscillation
frequency (f
X1
X2
Oscillation
stabilization
Note 2
time
Notes 1. Indicates only oscillator characteristics.
2. Time required to stabilize the resonator after reset or STOP mode is released.
3. Set by mask option/option byte (refer to CHAPTER 25).
4. The value differs depending on the OSTS register settings.
= −40 to +85°C, V
(2) External clock (T
A
Recommended Circuit
Parameter
Input frequency
X1
X2
Note
(f
)
X
External clock
Note The duty ratio of the input waveform must be within 50% ±5%.
Cautions 1. When using the main clock oscillator, wire as follows in the area enclosed by the broken lines in
the above figures to avoid an adverse effect from wiring capacitance.
• Keep the wiring length as short as possible.
• Do not cross the wiring with the other signal lines.
• Do not route the wiring near a signal line through which a high fluctuating current flows.
• Always make the ground point of the oscillator capacitor the same potential as V
• Do not ground the capacitor to a ground pattern through which a high current flows.
• Do not fetch signals from the oscillator.
2. When the main clock is stopped and the device is operating on the subclock, wait until the
oscillation stabilization time has been secured by the program before switching back to the
main clock.
CHAPTER 28 ELECTRICAL SPECIFICATIONS
= −40 to +85°C, V
A
Conditions
PLL mode
V
Note 1
)
X
V
V
Clock-through mode V
After reset is
When OSTS0
released
When OSTS0
After STOP mode is released
= 2.7 to 5.5 V, V
DD
Conditions
PLL mode
V
V
V
Clock-through mode V
User's Manual U16896EJ2V0UD
= 2.7 to 5.5 V, V
DD
SS
MIN.
= 4.5 to 5.5 V
DD
= 4.0 to 5.5 V
DD
= 2.7 to 5.5 V
DD
= 2.7 to 5.5 V
DD
Note 3
= 0
Note 3
= 1
= 0 V)
SS
MIN.
= 4.5 to 5.5 V
DD
= 4.0 to 5.5 V
DD
= 2.7 to 5.5 V
DD
= 2.7 to 5.5 V
DD
= 0 V)
TYP.
MAX.
Unit
2
5
MHz
2
4
MHz
2
2.5
MHz
2
10
MHz
13
2
/f
s
X
15
2
/f
s
X
Note 4
s
TYP.
MAX.
Unit
2
5
MHz
2
4
MHz
2
2.5
MHz
2
10
MHz
.
SS
657
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