HD6433937 Datasheet, PDF (410/521 Pages) Hitachi Semiconductor – Hardware Manual

13.2.3 AC Characteristics
Table 13-3 lists the control signal timing, and tables 13-4 list the serial interface timing of the
H8/3937 Series and 3937R Series.
Table 13-3 Control Signal Timing
V_CC = 1.8 V to 3.6 V, AV_CC = 1.8 V to 3.6 V, V_SS = AV_SS = 0.0 V, Ta = –20°C to +75°C
(including subactive mode) unless otherwise indicated.
Item
System clock
oscillation
frequency
Applicable
Symbol Pins
Min
f_OSC
OSC₁, OSC₂ 2
2
Values
Typ Max
— 10
—4
Unit Test Condition
MHz V_CC = 2.7 V to 3.6 V
V_CC = 1.8 V to 3.6 V
OSC clock (ø_OSC) t_OSC
cycle time
OSC₁, OSC₂ 100 —
250 —
500 ns V_CC = 2.7 V to 3.6 V
500
V_CC = 1.8 V to 3.6 V
Reference
Figure
Figure 13-1
System clock (ø) t_cyc
cycle time
Subclock oscilla- f_W
tion frequency
Watch clock (ø_W) t_W
cycle time
Subclock (ø_SUB) t_subcyc
cycle time
Instruction cycle
time
Oscillation
t_rc
stabilization time
External clock t_CPH
high width
External clock t_CPL
low width
2
—
DX₁, DX₂ —
DX₁, DX₂ —
2
—
128 t_OSC
— 208.3 µs
76.8 or —
kHz
160
26.0 or —
µs
12.5
—8
t_W
Figure 13-1
*
2
——
OSC₁, OSC₂ —
20
45
DX₁, DX₂
OSC₁
DX₁
OSC₁
DX₁
— — 50
— — 2.0
40 — —
200 — —
— 6.51 or —
3.125
40 — —
200 — —
— 6.51 or —
3.125
t_cyc
t_subcyc
µs V_CC = 2.2 V to 3.6 V (In
case of Figure 13-8)
Figure 13-8
ms
Figure 13-8
s
ns V_CC = 2.7 V to 3.6 V
V_CC = 1.8 V to 3.6 V
µs
Figure 13-1
ns V_CC = 2.7 V to 3.6 V
V_CC = 1.8 V to 3.6 V
µs
Figure 13-1
398