lan9500 Standard Microsystems Corp., lan9500 Datasheet - Page 16

• Manufacturer Part Number: lan9500
• Description: Lan9500/lan9500i Hi-speed Usb 2.0 To 10/100 Ethernet Controller
• Manufacturer: Standard Microsystems Corp.

Revision 1.4 (07-07-08)
NUM PINS
1
1
1
1
1
1
1
1
System Reset
Purpose I/O 8
Purpose I/O 9
Indicator LED
Indicator LED
Indicator LED
Ethernet Link
VBUS Power
Purpose I/O
Full-Duplex
Upstream
Ethernet
Ethernet
General
General
General
Activity
NAME
Speed
Detect
Test 1
Test 2
Test 3
10
nLNKA_LED
VBUS_DET
nSPD_LED
nFDX_LED
Table 2.4 Miscellaneous Pins (continued)
SYMBOL
nRESET
GPIO10
TEST1
TEST2
TEST3
GPIO8
GPIO9
DATASHEET
BUFFER
IS/O12/
IS/O12/
IS/O12/
TYPE
OD12
OD12
OD12
OD12
OD12
OD12
IS_5V
(PU)
(PU)
(PU)
(PU)
(PU)
(PU)
(PU)
(PD)
IS
16
-
-
-
System Reset (Active-Low)
Ethernet Full-Duplex Indicator LED (Active-
Low): This signal is driven low (LED on) when
the Ethernet link is operating in full-duplex mode.
General Purpose I/O 8
Ethernet Link Activity Indicator LED (Active-
Low): This signal is driven low (LED on) when a
valid link is detected. This pin is pulsed high (LED
off) for 80mS whenever transmit or receive
activity is detected. This pin is then driven low
again for a minimum of 80mS, after which time it
will repeat the process if TX or RX activity is
detected. Effectively, LED2 is activated solid for a
link. When transmit or receive activity is sensed,
LED2 will function as an activity indicator.
General Purpose I/O 9
Ethernet Speed Indicator LED (Active-Low):
This pin is driven low (LED on) when the Ethernet
operating speed is 100Mbs, or during auto-
negotiation. This pin is driven high during 10Mbs
operation, or during line isolation.
General Purpose I/O 10
Detect Upstream VBUS Power: Detects state of
upstream bus power. This pin must be tied to
VDD33IO when operating in bus powered mode.
Test 1: This pin must always be connected to
VDD33IO for proper operation.
Test 2: This pin must always be connected to
VSS for proper operation.
Test 3: This pin must always be connected to
VSS for proper operation.
Hi-Speed USB 2.0 to 10/100 Ethernet Controller
DESCRIPTION
SMSC LAN9500/LAN9500i
Datasheet