Ac Characteristics - Hitachi H8/3637 Hardware Manual

14.2.3

AC Characteristics

Table 14.3 lists the control signal timing, and tables 14.4 and 14.5 list the serial interface timing.
Table 14.3 Control Signal Timing
V = 2.7 V to 5.5 V, AV
CC
subactive mode, unless otherwise specified.
Item Symbol
System clock f
oscillation frequency
OSC clock (ø ) t
OSC
cycle time
System clock (ø) t
cycle time
Subclock oscillation f
frequency
Watch clock cycle t
time (ø )
W
Subclock (ø ) t
SUB
cycle time
Instruction cycle time
Oscillation stabiliza- t
tion time
(crystal oscillator)
Oscillation t
stabilization time
External clock high t
width
External clock low t
width
External clock rise t
time
External clock fall t
time
Pin RES low width
t
Notes: 1. A frequency between 1 MHz to 10 MHz is required when an external clock is input.
2. Selected with SA1 and SA0 of system clock control register 2 (SYSCR2).
= 2.7 V to 5.5 V, V
CC
Applicable
Pins
OSC , OSC
OSC 1 2
OSC , OSC
OSC 1 2
cyc
X , X
W 1 2
X , X
W 1 2
subcyc
OSC , OSC
rc 1 2
X , X
rc 1 2
OSC
CPH 1
OSC
CPL 1
CPr
CPf
RES
REL
= AV = 0.0 V, T
SS SS
Min Typ Max Unit
2 — 10 MHz
100 — 1000 ns
2 — 16 t
OSC
— — 2000 ns
— 32.768 — kHz
µs
— 30.5 —
2 — 8 t
W
2 — — t
cyc
t
subcyc
— — 40 ms
— — 60
— — 2 s
40 — — ns
80 — —
40 — — ns
80 — —
— — 15 ns
— — 20
— — 15 ns
— — 20
18 — — t
cyc
t
subcyc
= –20 to +75°C, including
a
Reference
Test Condition Figure
1
Figure 14.1
1
2
V = 4.0 V to 5.5 V
CC
V = 4.0 V to 5.5 V Figure 14.1
CC
V = 4.0 V to 5.5 V Figure 14.1
CC
V = 4.0 V to 5.5 V Figure 14.1
CC
V = 4.0 V to 5.5 V Figure 14.1
CC
Figure 14.2
305