CHAPTER 27 ELECTRICAL SPECIFICATIONS (TARGET VALUES)
Preliminary User’s Manual U16315EJ1V0UD
410
X1 Oscillator Characteristics
(T
A
=
−−−−
40 to +85
°°°°
C, 2.7 V
≤≤≤≤
V
DD
= EV
DD
≤≤≤≤
5.5 V, 2.7 V
≤≤≤≤
AV
REF
≤≤≤≤
V
DD
, V
SS
= EV
SS
= AV
SS
= 0 V)
Resonator
Recommended Circuit
Parameter
Conditions
MIN.
TYP.
MAX.
Unit
3.3 V
≤
V
DD
≤
5.5 V
2.0
8.38
When a capacitor
is connected to
the REGC pin
Note 2
2.7 V
≤
V
DD
< 3.3 V
2.0
5.0
MHz
4.0 V
≤
V
DD
≤
5.5 V
2.0
10
3.3 V
≤
V
DD
< 4.0 V
2.0
8.38
Ceramic
resonator
C1
X2
X1
IC
(V
PP
)
C2
Oscillation
frequency (f
XP
)
Note 1
When the REGC
pin is directly
connected to V
DD
2.7 V
≤
V
DD
< 3.3 V
2.0
5.0
MHz
3.3 V
≤
V
DD
≤
5.5 V
2.0
8.38
When a capacitor
is connected to
the REGC pin
Note 2
2.7 V
≤
V
DD
< 3.3 V
2.0
5.0
MHz
4.0 V
≤
V
DD
≤
5.5 V
2.0
10
3.3 V
≤
V
DD
< 4.0 V
2.0
8.38
Crystal
resonator
C1
X2
X1
IC
(V
PP
)
C2
Oscillation
frequency (f
XP
)
Note 1
When the REGC
pin is directly
connected to V
DD
2.7 V
≤
V
DD
< 3.3 V
2.0
5.0
MHz
4.0 V
≤
V
DD
≤
5.5 V
2.0
10
3.3 V
≤
V
DD
< 4.0 V
2.0
8.38
X1 input
frequency (f
XP
)
Note 1
2.7 V
≤
V
DD
< 3.3 V
2.0
5.0
MHz
4.0 V
≤
V
DD
≤
5.5 V
46
500
3.3 V
≤
V
DD
< 4.0 V
56
500
External
clock
Note 3
X2
X1
X1 input high-
/low-level width
(t
XPH
, t
XPL
)
2.7 V
≤
V
DD
< 3.3 V
96
500
ns
Notes 1.
Indicates only oscillator characteristics. Refer to
AC Characteristics
for instruction execution time.
2.
When the REGC pin is connected to V
SS
via a 0.1
µ
F capacitor.
3.
Connect the REGC pin directly to V
DD
.
Cautions 1. When using the X1 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
SS
.
• Do not ground the capacitor to a ground pattern through which a high current flows.
• Do not fetch signals from the oscillator.
2. Since the CPU is started by the Ring-OSC after reset, check the oscillation stabilization time of
the X1 input clock using the oscillation stabilization time status register (OSTC). Determine the
oscillation stabilization time of the OSTC register and oscillation stabilization time select
register (OSTS) after sufficiently evaluating the oscillation stabilization time with the resonator
to be used.
Remark
For the resonator selection and oscillator constant, users are required to either evaluate the oscillation
themselves or apply to the resonator manufacturer for evaluation.
Содержание 78K0/KD1 Series
Страница 2: ...Preliminary User s Manual U16315EJ1V0UD 2 MEMO ...
Страница 444: ...Preliminary User s Manual U16315EJ1V0UD 444 MEMO ...