Datasheet

LAN9514/LAN9514I
DS00002306A-page 14  2009-2016 Microchip Technology Inc.
2.2 Port Power Control
This section details the usage of the port power control pins PRTCTL[5:2].
2.2.1 PORT POWER CONTROL USING A USB POWER SWITCH
The LAN9514/LAN9514i has a single port power control and over-current sense signal for each downstream port. When
disabling port power, the driver will actively drive a ‘0’. To avoid unnecessary power dissipation, the internal pull-up resis-
tor will be disabled at that time. When port power is enabled, the output driver is disabled and the pull-up resistor is
FIGURE 2-2: POWER CONNECTIONS
+3.3V
(IN)
+1.8V
(OUT)
Internal Core
Regulator
VDD33IO
+3.3V
VDD18CORE
VDD18CORE
Core Logic
VDD18USBPLL
USB PHY
1.0uF
Exposed Pad
VDD33A
VDD33IO
0.1uF
VDD33IO
VDD33IO
VDD33IO
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
LAN9514
VDD33A
VDD33A
VDD33A
0.1uF
0.1uF
64-PIN QFN
2.0A
120 ohm @
100MHz
VSS
VDD18ETHPLL
0.1uF
PLL
&
Ethernet PHY
0.1uF
2.0A
120 ohm @
100MHz
VDD33A
0.1uF
VDD33A
VDD33A
0.1uF
0.1uF
+3.3V
(IN)
+1.8V
(OUT)
Internal USB PLL
Regulator
4.7uF 0.1uF 0.1uF