CHAPTER 31 ELECTRICAL SPECIFICATIONS
Page 859 of 920
31.2
Oscillator Characteristics
31.2.1
X1, XT1 characteristics
Note
Indicates only permissible oscillator frequency ranges. Refer to
for instruction execution time.
Request evaluation by the manufacturer of the oscillator circuit mounted on a board to check the oscillator
characteristics.
Caution
Since the CPU is started by the high-speed on-chip oscillator clock after a reset release, check the X1 clock
oscillation stabilization time using the oscillation stabilization time counter status register (OSTC) by the user.
Determine the oscillation stabilization time of the OSTC register and the oscillation stabilization time select
register (OSTS) after sufficiently evaluating the oscillation stabilization time with the resonator to be used.
Remark
When using the X1 oscillator and XT1 oscillator, refer to
31.2.2
On-chip oscillator characteristics
Note 1.
High-speed on-chip oscillator frequency is selected with bits 0 to 4 of the option byte (000C2H/010C2H) and bits 0 to 2 of
the HOCODIV register.
Note 2.
This only indicates the oscillator characteristics. Refer to
for instruction execution time.
(T
A
=
‒
40 to +85 °C, 1.8 V
≤
V
DD
≤
3.6 V, V
SS
= 0 V)
Resonator
Resonator
Conditions
MIN.
TYP.
MAX.
Unit
X1 clock oscillation frequency (f
X
)
Ceramic resonator/
crystal resonator
2.7 V
≤
V
DD
≤
3.6 V
1.0
20.0
MHz
2.4 V
≤
V
DD
<
2.7 V
1.0
16.0
1.8 V
≤
V
DD
< 2.4 V
1.0
8.0
XT1 clock oscillation frequency (f
XT
)
Crystal resonator
32
32.768
35
kHz
(T
A
=
‒
40 to +85
°
C, 1.8 V
≤
V
DD
≤
3.6 V, V
SS
= 0 V)
Oscillators
Parameters
Conditions
MIN.
TYP.
MAX.
Unit
High-speed on-chip oscillator clock frequency
f
IH
1
32
MHz
High-speed on-chip oscillator clock frequency
accuracy
‒
20 to +85
°
C
1.8 V
≤
V
DD
≤
3.6 V
‒
1.0
+1.0
%
‒
40 to
‒
20
°
C
1.8 V
≤
V
DD
≤
3.6 V
‒
1.5
+1.5
%
Low-speed on-chip oscillator clock frequency f
IL
15
kHz
Low-speed on-chip oscillator clock frequency
accuracy
‒
15
+15
%
Содержание RL78/G1H
Страница 941: ...R01UH0575EJ0120 RL78 G1H...