Renesas F-ZTAT H8 Series Hardware Manual page 124

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