H8S2110B RENESAS [Renesas Technology Corp], H8S2110B Datasheet - Page 474

• Manufacturer Part Number: H8S2110B
• Description: Renesas 16-Bit Single-Chip Microcomputer Renesas H8S Family/H8S/2100 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 18 Clock Pulse Generator
Table 18.3 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 18.4 shows the external clock output
stabilization delay time. Figure 18.6 shows the timing of the external clock output stabilization
delay time.
Rev. 2.00 Mar 21, 2006 page 436 of 518
REJ09B0299-0200
DEXT
) has passed. As the clock signal output is not determined during the t
EXTAL
t
EXr
Figure 18.5 External Clock Input Timing
Symbol
t
t
t
t
t
t
EXL
EXH
EXr
EXf
CL
CH
t
EXH
Min
40
40
—
—
0.4
80
0.4
80
V
CC
= 2.7 to 3.6 V
Max
—
—
10
10
0.6
—
0.6
—
t
EXf
t
EXL
Unit
ns
ns
ns
ns
t
ns
t
ns
cyc
cyc
V
CC
Test Conditions
Figure 18.5
× 0.5
< 5 MHz
5 MHz
5 MHz
5 MHz
DEXT
cycle, a reset
Figure
21.5