Renesas F-ZTAT H8 Series, Hardware Manual

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4. Clock Pulse Generators
Rev.3.00 Jul. 19, 2007 page 98 of 532
REJ09B0397-0300
t
xH
t
xL
t
xf
t
xr
V
IH
V
IL
Figure 4.10 External Subclock Timing
The DC characteristics and timing of an external clock input to the X
1
pin are shown in table 4.2.
Table 4.2 DC Characteristics and Timing
(V
CC
= 2.7 V to 5.5 V of the mask ROM version of H8/3852, H8/3853, and H8/3854,
V
CC
= 3.0 V to 5.5 V of H8/3854F and H8/3857 Group, AV
CC
= 3.0 V to 5.5 V,
V
SS
= AV
SS
= 0.0 V, T
a
= –20°C to + 75°C*, unless otherwise specified, including subactive mode)
Item Symbol
Applicable
Pin Test
Conditions
Values
Min Typ Max Unit Notes
Input high voltage V
IH
X
1
V
CC
−
0.3
⎯
V
CC
+0.3 V Figure 4.10
Input low voltage V
IL
−
0.3
⎯
0.3
External subclock
rise time t
xr
⎯ ⎯
100 ns Figure 4.10
External subclock
fall time t
xf
⎯ ⎯
100
External subclock
oscillation frequency f
x
fx =
32.768 kHz
⎯
32.768
⎯
kHz
External subclock
high width t
xH
12.0
⎯ ⎯ μ
s Figure 4.10
External subclock
low width t
xL
12.0
⎯ ⎯
External subclock
oscillation frequency f
x
fx =
38.4 kHz
⎯
38.4
⎯
kHz
External subclock
high width t
xH
10.0
⎯ ⎯ μ
s Figure 4.10
External subclock
low width t
xL
10.0
⎯ ⎯
Note: * The guaranteed temperature as an electrical characteristic for die type products is
75°C.