HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 591

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

External Clock
The external clock signal should have the same frequency as the system clock ( ).
Table 17.4 and figure 17.6 show the input conditions for the external clock.
Table 17.4 External Clock Input Conditions
Note:
Table 17.5 and figure 17.6 show the external clock input conditions when the duty adjustment
circuit is not used. When the duty adjustment circuit is not used, the output waveform depends
on the external clock input waveform, and therefore no specifications are provided.
Item
External clock
input pulse
width low level
External clock
input pulse
width high level
External clock
rise time
External clock
fall time
Clock pulse
width low level
Clock pulse
width high level
* Does not apply to the HD6472246.
Symbol Min
t
t
t
t
t
t
EXL
EXH
EXr
EXf
CL
CH
40
40
—
—
0.4
80
0.4
80
V
to 5.5 V
CC
= 2.7 V
Max
—
—
10
10
0.6
—
0.6
—
Min
30
30
—
—
0.4
80
0.4
80
V
to 5.5 V*
CC
= 2.7 V
Max
—
—
7.5
7.5
0.6
—
0.6
—
Rev.3.00 Mar. 26, 2007 Page 549 of 772
Min
20
20
—
—
0.4
80
0.4
80
V
CC
±10%
= 5.0 V
Section 17 Clock Pulse Generator
Max
—
—
5
5
0.6
—
0.6
—
Unit
ns
ns
ns
ns
t
ns
t
ns
cyc
cyc
Test Conditions
Figure 17.6
REJ09B0355-0300
< 5 MHz
< 5 MHz
5 MHz
5 MHz
Figure
19.4