Datasheet

Section 28 Electrical Characteristics
Page 926 of 982 REJ09B0465-0300 Rev. 3.00
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S
/
20235 Group
28.4 AC Characteristics
Table 28.4 AC Characteristics
V
CC
= 2.7 to 5.5 V, V
SS
= 0.0 V, VCC ≥ AVCC, Ta = −20 to +85 °C (N version)/
−40 to +85 °C (D version), unless otherwise indicated.
Values
Item Symbol
Applicable
Pins
Test
Conditions
Min. Typ. Max. Unit
Reference
Figure
Main clock oscillator
oscillation frequency
φ
OSC
OCS1, OSC2 4.0 ⎯ 20.0 MHz
Subclock oscillator
oscillation frequency
φ
sub
X1, X2 ⎯ 32.768 ⎯ kHz
Low-speed on-chip
oscillator oscillation
frequency
φ
loco
25 125 225 kHz
System reference clock
(φ
base
) cycle time
t
base
1 ⎯ 1 φ
OSC
φ
sub
φ
loco
1 ⎯ 128 t
base
* System clock (φ) cycle time t
cyc
⎯ ⎯ 320.0 μs
1 ⎯ 32 t
cyc
Bus master operation clock
(φs) cycle time
t
bcyc
⎯ ⎯ 320.0 μs
Instruction cycle time 1 ⎯ ⎯ t
cyc
Oscillation stabilization time
(crystal resonator)
t
rc
OSC1, OSC2 ⎯ ⎯ 6.5 ms
Oscillation stabilization time
(ceramic resonator)
t
rc
OSC1, OSC2 ⎯ ⎯ 6.5 ms
Figure
28.3
Oscillation stabilization time t
rcx
X1, X2 ⎯ ⎯ 2.0 s
External clock high width t
CPH
OSC1 20.0 ⎯ ⎯ ns
External clock low width t
CPL
OSC1 20.0 ⎯ ⎯ ns
Figure
28.1