h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 720

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 23 Electrical Characteristics [Preliminary]
23.3.1
Table 23.4 lists the clock timing
Table 23.4 Clock Timing
Condition: V
Rev. 2.00 Dec. 05, 2005 Page 682 of 724
REJ09B0200-0200
Item
Clock cycle time
Clock high pulse width
Clock low pulse width
Clock rise time
Clock fall time
Clock oscillator settling time at
reset (crystal)
Clock oscillator settling time in
software standby (crystal)
External clock output settling time t
Subclock oscillator settling time
Subclock oscillator frequency
Subclock (φ
Clock Timing
V
(regular specifications), T
SUB
CC
ref
) cycle time
= AV
= 4.5 V to AV
CC
= 4.5 V to 5.5 V, LPV
φ
CC
Figure 23.2 System Clock Timing
, V
SS
Symbol
t
t
t
t
t
t
t
t
f
t
= PWMV
cyc
CH
CL
Cr
Cf
OSC1
OSC2
DEXT
OSC3
SUB
SUB
a
= –40°C to +85°C (wide-range specifications)
t
CH
CC
SS
Min.
50
15
15
—
—
20
8
2
—
32.768
30.5
t
= 4.5 V to 5.5 V, PWMV
= PLLV
cyc
t
Cf
t
CL
SS
= AV
Max.
250
—
—
10
10
—
—
—
2
t
Cr
SS
= 0 V, T
Unit
ns
ns
ns
ns
ns
ms
ms
ms
s
kHz
µs
CC
a
= 4.5 V to 5.5 V,
= –20°C to +75°C
Test Conditions
Figure 23.2
Figure 23.3
Figure 21.3
Figure 23.3