HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 652
HD6432160
Manufacturer Part Number
HD6432160
Description
Hitachi 16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6432160.pdf
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Table 25.3 External Clock Input Conditions
Item
External clock input
pulse width low level
External clock input
pulse width high level
External clock rising time
External clock falling
time
Clock pulse width low
level
Clock pulse width high
level
The oscillator and duty correction circuit have a function to adjust the waveform of the external
clock input that is input to the EXTAL pin. When a specified clock signal is input to the EXTAL
pin, internal clock signal output is determined after the external clock output stabilization delay
time (t
signal should be set to low to hold it in reset state. Table 25.4 shows the external clock output
stabilization delay time. Figure 25.6 shows the timing of the external clock output stabilization
delay time.
Rev. 2.0, 08/02, page 612 of 788
DEXT
) has passed. As the clock signal output is not determined during the t
EXTAL
t
EXr
Figure 25.5 External Clock Input Timing
Symbol
t
t
t
t
t
t
EXL
EXH
EXr
EXf
CL
CH
V
to 3.6 V
Min
40
40
—
—
0.4
80
0.4
80
CC
t
EXH
= 2.7
Max
—
—
10
10
0.6
—
0.6
—
V
Min
20
20
—
—
0.4
80
0.4
80
CC
10
= 5.0 V
t
EXf
t
EXL
Max
—
—
5
5
0.6
—
0.6
—
Unit
ns
ns
ns
ns
t
ns
t
ns
cyc
cyc
V
Test Conditions
Figure 25.5
ø
ø
ø
ø < 5 MHz
CC
× 0.5
5 MHz
5 MHz
5 MHz
DEXT
cycle, a reset
Figure
28.6
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