Section 29 Electrical Characteristics
Rev. 3.00 Jan 25, 2006 page 835 of 872
REJ09B0286-0300
29.3.1
Clock Timing
Table 29.7 shows the clock timing. The clock timing specified here covers clock output (
φ
), clock
pulse generator (crystal) and external clock input (EXTAL pin) oscillation stabilization times. For
details of external clock input (EXTAL pin and EXCL pin) timing, see section 26, Clock Pulse
Generator.
Table 29.7 Clock Timing
Condition A: V
CC
= 3.0 V to 3.6 V, V
SS
= 0 V,
φ
= 5 MHz to 25 MHz
Condition B: V
CC
= 2.7 V to 3.6 V, V
SS
= 0 V,
φ
= 5 MHz to 20 MHz
Condition A
Condition B
Item
Symbol
Min
Max
Min
Max
Unit
Reference
Clock cycle time
t
cyc
40
200
50
200
Clock high pulse width
t
CH
15
—
20
—
Clock low pulse width
t
CL
15
—
20
—
Clock rise time
t
Cr
—
5
—
5
Clock fall time
t
Cf
—
5
—
5
ns
Figure 29.4
Reset oscillation
stabilization (crystal)
t
OSC1
10
—
10
—
Figure 29.5
Software standby
oscillation stabilization
time (crystal)
t
OSC2
8
—
8
—
ms
Figure 29.6
External clock output
stabilization delay time
t
DEXT
500
—
500
—
µs
Figure 29.5
The clock timing is shown below.
t
Cr
t
CL
t
Cf
t
cyc
t
CH
φ
Figure 29.4 System Clock Timing
Содержание H8S/2158
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Страница 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Страница 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
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Страница 744: ...Section 20 Encryption Operation Circuit DES and GF Rev 3 00 Jan 25 2006 page 690 of 872 REJ09B0286 0300...
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Страница 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
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Страница 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Страница 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...