LAN9514_12 Datasheet, PDF (13/52 Pages) SMSC Corporation – USB 2.0 Hub and 10/100 Ethernet Controller

USB 2.0 Hub and 10/100 Ethernet Controller
Datasheet
NUM
PINS
NAME
USB Port Power
Control 2
1
USB Port Power
Control 3
1
USB Port Power
Control 4
1
USB Port Power
Control 5
1
External USB
1
Bias Resistor
USB PLL +1.8V
1
Power Supply
Table 2.4 USB Pins (continued)
SYMBOL
PRTCTL2
PRTCTL3
PRTCTL4
PRTCTL5
USBRBIAS
VDD18USBPLL
BUFFER
TYPE
DESCRIPTION
IS/OD12
(PU)
When used as an output, this pin enables power to
downstream USB peripheral 2.
When used as an input, this pin is used to sample
the output signal from an external current monitor
for downstream USB peripheral 2. An overcurrent
condition is indicated when the signal is low.
Refer to Section 2.2 for additional information.
IS/OD12
(PU)
When used as an output, this pin enables power to
downstream USB peripheral 3.
When used as an input, this pin is used to sample
the output signal from an external current monitor
for downstream USB peripheral 3. An overcurrent
condition is indicated when the signal is low.
Refer to Section 2.2 for additional information.
IS/OD12
(PU)
When used as an output, this pin enables power to
downstream USB peripheral 4.
When used as an input, this pin is used to sample
the output signal from an external current monitor
for downstream USB peripheral 4. An overcurrent
condition is indicated when the signal is low.
Refer to Section 2.2 for additional information.
IS/OD12
(PU)
When used as an output, this pin enables power to
downstream USB peripheral 5.
When used as an input, this pin is used to sample
the output signal from an external current monitor
for downstream USB peripheral 5. An overcurrent
condition is indicated when the signal is low.
Refer to Section 2.2 for additional information.
AI
Used for setting HS transmit current level and on-
chip termination impedance. Connect to an
external 12K 1.0% resistor to ground.
P
Refer to the LAN9514/LAN9514i reference
schematics for additional connection information.
Crystal Input
XI
1
1
Crystal Output
XO
ICLK
OCLK
External 25 MHz crystal input.
Note:
This pin can also be driven by a single-
ended clock oscillator. When this method
is used, XO should be left unconnected
External 25 MHz crystal output.
SMSC LAN9514/LAN9514i
13
DATASHEET
Revision 1.2 (02-29-12)