Datasheet

 2009-2016 Microchip Technology Inc. DS00002306A-page 9
LAN9514/LAN9514I
1 Detect
Upstream VBUS
Power
VBUS_DET IS_5V This pin detects the state of the upstream bus
power. The Hub monitors VBUS_DET to determine
when to assert the USBDP0 pin's internal pull-up
resistor (signaling a connect event).
For bus-powered hubs, this pin must be tied to
VDD33IO.
For self-powered hubs where the device is
permanently attached to a host, VBUS_DET should
be pulled to VDD33IO. For other self-powered
applications, refer to the device reference
schematic for additional connection information.
1 Auto-MDIX
Enable
AUTOMDIX_EN IS Determines the default Auto-MDIX setting.
0 = Auto-MDIX is disabled.
1 = Auto-MDIX is enabled.
1 Test 1 TEST1 — Used for factory testing, this pin must always be left
unconnected.
1 Test 2 TEST2 — Used for factory testing, this pin must always be
connected to VSS for proper operation.
1 Test 3 TEST3 — Used for factory testing, this pin must always be
connected to VDD33IO for proper operation.
1 24 MHz Clock
Enable
CLK24_EN IS This pin enables the generation of the 24 MHz
clock on the CLK_24_OUT pin.
1 24 MHz Clock CLK24_OUT 08 This pin outputs a 24 MHz clock that can be used
a reference clock for a partner hub.
1 Test 4 TEST4 — Used for factory testing, this pin must always be left
unconnected.
TABLE 2-4: USB PINS
Num
PINs
Name Symbol
Buffer
Type
Description
1 Upstream
USB DMINUS 0
USBDM0 AIO Upstream USB DMINUS signal.
1 Upstream
USB
DPLUS 0
USBDP0 AIO Upstream USB DPLUS signal.
1 Downstream
USB DMINUS 2
USBDM2 AIO Downstream USB peripheral 2 DMINUS signal.
1 Downstream
USB DPLUS 2
USBDP2 AIO Downstream USB peripheral 2 DPLUS signal.
TABLE 2-3: MISCELLANEOUS PINS (CONTINUED)
Num
PINs
Name Symbol
Buffer
Type
Description