Rev. 2.00, 09/03, page 672 of 690
t
Scyc
t
TXD
t
RXH
t
RXS
t
RTSD
t
CTSH
t
CTSS
SCK
RTS
CTS
TxD
(data trans-
mission)
RxD
(data
reception)
Figure 25.50 SCIF Input/Output Timing in Clock Synchronous Mode
25.3.12
USB Module Signal Timing
Table 25.14 USB Module Clock Timing
(Conditions: V
CC
Q = V
CC
-RTC = V
CC
-USB = 3.0 to 3.6 V, V
CC
= V
CC
-PLL1 = V
CC
-PLL2 = 1.4 to
1.6 V, AV
CC
= 3.0 to 3.6 V, V
SS
Q = V
SS
= V
SS
-RTC = V
SS
-USB = V
SS
-PLL1 = V
SS
-PLL2 =
AV
SS
= 0 V, T
a
= –20 to 75°C)
Item
Symbol
Min
Max
Unit
Figure
Frequency (48 MHz)
*
t
FREQ
47.9
48.1
MHz
25.51
Clock rise time
*
t
R48
—
4
ns
Clock fall time
*
t
F48
—
4
ns
Duty (t
HIGH
/t
LOW
)
*
t
DUTY
90
110
%
Oscillation settling time
t
UOSC
10
—
ms
25.52
Note:
*
When the USB is operated by supplying a clock to the EXTAL_USB pin from off-chip, the
supplied clock must satisfy the above clock specifications.
t
HIGH
t
LOW
t
FREQ
10%
t
R48
t
F48
90%
EXTAL_USB
Figure 25.51 USB Clock Timing
Содержание SH7705
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