HD6413003RVF RENESAS [Renesas Technology Corp], HD6413003RVF Datasheet - Page 527

• Manufacturer Part Number: HD6413003RVF
• Description: microcontroller (MCU)
• Manufacturer: RENESAS [Renesas Technology Corp]

External Clock
•
•
Table 16-3 Clock Timing
Item
External clock rise
time
External clock fall
time
External clock
input duty (a/t cyc )
ø clock width
duty (b/t cyc )
Clock-halving version
The external clock signal should have a frequency equal to twice the system clock frequency
(ø) and a duty cycle of 40% to 60%.
1:1 version
The external clock frequency should be equal to the system clock frequency (ø). Table 16-3
and figure 16-6 indicate the clock timing.
EXTAL
Ø
Symbol
t
t
—
—
EXr
EXf
Figure 16-6 External Clock Input Timing
t
EXr
V
Min
—
—
30
40
40
CC
a
= 2.7 to 5.5 V V
b
Max
10
10
70
60
60
509
t
t
Min
—
—
30
40
40
cyc
t
cyc
EXf
CC
= 5.0 V ± 10%
Max
5
5
70
60
60
Unit Test Conditions
ns
ns
%
%
%
ø ≥ 5 MHz
ø < 5 MHz
V
V
CC
CC
0.5
0.5
Figure
16-6