HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 592

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

Section 17 Clock Pulse Generator
Table 17.5 External Clock Input Conditions when Duty Adjustment Circuit Is Not Used
Notes: When the duty adjustment circuit is not used, the maximum operating frequency falls
Rev.3.00 Mar. 26, 2007 Page 550 of 772
REJ09B0355-0300
Item
External clock
input pulse
width low level
External clock
input pulse
width high level
External clock
rise time
External clock
fall time
according to the input waveform.
(Example: When t
therefore the maximum operating frequency = 16.7 MHz.)
* Does not apply to the HD6472246.
EXTAL
Symbol
t
t
t
t
EXL
EXH
EXr
EXf
t
EXr
EXL
Figure 17.6 External Clock Input Timing
= t
Min
50
50
—
—
V
EXH
CC
to 5.5 V
= 25 ns and t
= 2.7 V
Max
—
—
10
10
t
EXH
Min
37.5 —
37.5 —
—
—
V
to 5.5 V*
CC
EXr
= 2.7 V
= t
Max
7.5
7.5
EXf
= 5 ns, the clock cycle time = 60 ns, and
t
EXf
Min
25
25
—
—
V
t
EXL
CC
±10%
= 5.0 V
Max
—
—
5
5
Unit
ns
ns
ns
ns
V
CC
Test Conditions
Figure 17.6
0.5