Datasheet
Hi-Speed USB 2.0 to 10/100/1000 Ethernet Controller
Datasheet
Revision 1.0 (11-01-10) 16 SMSC LAN7500/LAN7500i
DATASHEET
Table 2.6 Miscellaneous Pins
NUM PINS NAME SYMBOL
BUFFER
TYPE DESCRIPTION
1
System Reset nRESET VIS
(PU)
This active-low pin allows external hardware to
reset the device.
Note: Assertion of nRESET is required
following power-on.
PME Clear PME_CLEAR VIS
(PU)
This pin may serve as the PME_CLEAR input
when PME mode of operation is in effect. Refer
to Chapter 4, "PME Operation," on page 30 for
additional information.
1
Detect
Upstream
VBUS Power
VBUS_DET IS_5V
(PD)
Detects state of upstream bus power.
For bus powered operation, this pin must be tied
to VDD33A.
For self powered operation, refer to the
LAN7500/LAN7500i reference schematics.
1
Test TEST - This pin must always be connected to VSS for
proper operation.
1
Switching
Regulator
Mode
SW_MODE VO6 When asserted, this pin places the external
switching regulator into power saving mode.
Note: The SW_MODE_POL and
SW_MODE_SEL bits of Configuration
Flags 1 control the polarity of the pin
and when it is asserted, respectively.
Table 2.7 I/O Power Pins, Core Power Pins, and Ground Pad
NUM PINS NAME SYMBOL
BUFFER
TYPE DESCRIPTION
1
+3.3V Analog
Power Supply
Input
VDD33A P Refer to Chapter 6, "Application Diagrams," on
page 36 and the LAN7500/LAN7500i reference
schematics for connection information.
4
+3.3V/+2.5V
I/O Power
Supply Input
VDDVARIO P Refer to Chapter 6, "Application Diagrams," on
page 36 and the LAN7500/LAN7500i reference
schematics for connection information.
6
Digital Core
+1.2V Power
Supply Input
VDD12CORE P Refer to Chapter 6, "Application Diagrams," on
page 36 and the LAN7500/LAN7500i reference
schematics for connection information.
1
USB PLL
+1.2V Power
Supply Input
VDD12USBPLL P Refer to Chapter 6, "Application Diagrams," on
page 36 and the LAN7500/LAN7500i reference
schematics for additional connection information.
4
Ethernet
+1.2V Port
Power Supply
Input For
Channels 0-3
VDD12A P Refer to Chapter 6, "Application Diagrams," on
page 36 and the LAN7500/LAN7500i reference
schematics for additional connection information.