E62655RUSB Renesas Electronics America, E62655RUSB Datasheet - Page 770

• Manufacturer Part Number: E62655RUSB
• Description: EMULATOR BASE H8S/2655R W/USB
• Manufacturer: Renesas Electronics America
• Type: Microcontrollerr

Specifications of E62655RUSB

• Contents: E6000 Emulator Unit and 4 Logic Probes
• For Use With/related Products: H8S/2655R
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Section 20 Clock Pulse Generator
External Clock
The external clock signal should have the same frequency as the system clock ( ).
Table 20.4 and figure 20.6 show the input conditions for the external clock.
Table 20.4 External Clock Input Conditions
Item
External clock input
low pulse width
External clock input
high pulse width
External clock rise time t
External clock fall time
Clock low pulse width
level
Clock high pulse width
level
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REJ09B0331-0500
EXTAL
t
EXr
Symbol
t
t
t
t
t
EXL
EXH
EXr
EXf
CL
CH
Figure 20.6 External Clock Input Timing
V
to 5.5 V
Min
40
40
—
—
0.4
80
0.4
80
CC
t
= 2.7 V
EXH
Max
—
—
10
10
0.6
—
0.6
—
V
±10%
Min
20
20
—
—
0.4
80
0.4
80
CC
= 5.0 V
t
Max
—
—
5
5
0.6
—
0.6
—
EXf
t
EXL
Unit
ns
ns
ns
ns
t
ns
t
ns
cyc
cyc
Test
Conditions
Figure 20.6
< 5 MHz
< 5 MHz
5 MHz
5 MHz
V
CC
0.5
Figure 22.4