SMSC USB2250 User Manual
Ultra Fast USB 2.0 Multi-Slot Flash Media Controller
Datasheet
Revision 1.1 (05-29-08)
32
SMSC USB2250/50i/51/51i
DATASHEET
Note 7.9
The assignment of each Integrated Card Power FET to a designated Card Connector is
controlled by both firmware and the specific board implementation. Firmware will default to
the settings listed in
controlled by both firmware and the specific board implementation. Firmware will default to
the settings listed in
.
Note 7.10 The 3.3V supply should be at least at 75% of its operating condition before the 1.8V supply
is allowed to ramp up.
7.4
Capacitance
T
A
= 25°C; fc = 1MHz; V
DD,
V
DDP
= 1.8V
Table 7.1 Pin Capacitance
PARAMETER
SYMBOL
LIMITS
UNIT
TEST CONDITION
MIN
TYP
MAX
Clock Input Capacitance
C
XTAL
2
pF
All pins (except USB pins
and pins under test) are tied
to AC ground.
and pins under test) are tied
to AC ground.
Input Capacitance
C
IN
10
pF
Output Capacitance
C
OUT
20
pF