Table of Contents
Advertisement
RC oscillation (mask option)
(T
= –40 to +85°C, V
= 1.8 to 5.5 V)
A
DD
Resonator
Recommended Circuit
CL1
RC resonator
External clock
CL1
Notes 1. Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
2. Variations in external resistance and external capacitance are not included.
3. Time required to stabilize oscillation after reset or STOP mode release.
Cautions 1. When using the main system clock oscillator, wire as follows in the area enclosed by the
broken lines in the above figure 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 system clock is stopped and the device is operating on the subsystem clock,
wait until the oscillation stabilization time has been secured by the program before switching
back to the main system clock.
RC Oscillation Frequency Characteristics (T
Parameter
Symbol
Oscillation frequency
f
cc1
f
cc2
f
cc3
f
cc4
f
cc5
f
cc6
Remark
The TYP. value of the oscillation frequency falls within a range of 2.0 to 4.0 MHz, so set RC to one of
the above values.
318
CHAPTER 20 ELECTRICAL SPECIFICATIONS
Parameter
CL2
Oscillation frequency
Notes 1,2
(f
)
CC
Oscillation
Note 3
stabilization time
CL1 input frequency
CL2
Note 1
(f
)
CC
CL1 input high-/low-
level width (t
,t
)
XH
XL
OPEN
= –40 to +85°C, V
A
Conditions
R = 11.0 kΩ,
V
DD
C = 22 pF
V
DD
R = 6.8 kΩ,
V
DD
C = 22 pF
V
DD
R = 4.7 kΩ,
V
DD
C = 22 pF
V
DD
User's Manual U15075EJ2V1UD
Conditions
MIN.
V
= Oscillation
2.0
DD
voltage range
V
= 2.7 to 5.5 V
DD
V
= 1.8 to 5.5 V
128
DD
1.0
100
= 1.8 to 5.5 V)
DD
MIN.
= 2.7 to 5.5 V
1.5
= 1.8 to 5.5 V
0.5
= 2.7 to 5.5 V
2.5
= 1.8 to 5.5 V
0.75
= 2.7 to 5.5 V
3.5
= 1.8 to 5.5 V
1.0
TYP.
MAX.
4.0
32
4.0
500
.
SS
TYP.
MAX.
Unit
MHz
2.0
2.5
MHz
2.0
2.5
MHz
3.0
3.5
MHz
3.0
3.5
MHz
4.0
4.7
MHz
4.0
4.7
Unit
MHz
µ
s
µ
s
MHz
ns
Advertisement
Table of Contents
