HD6432621 Hitachi, HD6432621 Datasheet - Page 778

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

22.3.1
Table 22-4 lists the clock timing
Table 22-4 Clock Timing
Conditions : V
Item
Clock cycle time
Clock high pulse width
Clock low pulse width
Clock rise time
Clock fall time
Oscillation stabilization time at
reset (crystal)
Oscillation stabilization time in
software standby (crystal)
External clock output
stabilization delay time
32 kHz clock oscillation settling
time
Sub clock oscillator frequency
Sub clock (ø
734
Clock Timing
SUB
V
+75°C (regular specifications), T
) cycle time
CC
ref
= 4.5 V to AV
= PLLV
ø
CC
= 3.0 V to 3.6 V, PV
Figure 22-2 System Clock Timing
CC
Symbol
t
t
t
t
t
t
t
t
t
f
t
, V
cyc
CH
CL
Cr
Cf
OSC1
OSC2
DEXT
OSC3
SUB
SUB
SS
= AV
t
CH
SS
Min
50
15
15
—
—
20
8
2
—
32.768
30.5
a
= 0 V, ø = 32.768 kHz, 4 to 20 MHz, T
t
= –40°C to +85°C (wide-range specifications)
cyc
CC
t
Cf
t
= 4.5 V to 5.5 V, AV
CL
Max
250
—
—
5
5
—
—
—
2
—
—
t
Cr
Unit
ns
ns
ns
ns
ns
ms
ms
ms
s
kHz
s
CC
= 4.5 V to 5.5 V,
— Preliminary —
Test Conditions
Figure 22-2
Figure 22-3
Figure 21A-3,
Figure 21B-3
Figure 22-3
a
= –20°C to