Datasheet

USB 2.0 Hub and 10/100 Ethernet Controller
Datasheet
Revision 1.2 (02-29-12) 10 SMSC LAN9512/LAN9512i
DATASHEET
Table 2.1 EEPROM Pins
NUM
PINS NAME SYMBOL
BUFFER
TYPE DESCRIPTION
1
EEPROM Data
In
EEDI IS
(PD)
This pin is driven by the EEDO output of the
external EEPROM.
1
EEPROM Data
Out
EEDO O8 This pin drives the EEDI input of the external
EEPROM.
1
EEPROM Chip
Select
EECS O8 This pin drives the chip select output of the external
EEPROM.
1
EEPROM Clock EECLK O8 This pin drives the EEPROM clock of the external
EEPROM.
Table 2.2 JTAG Pins
NUM
PINS NAME SYMBOL
BUFFER
TYPE DESCRIPTION
1
JTAG Test Port
Reset
nTRST IS This active low pin functions as the JTAG test port
reset input.
Note: This pin should be tied high if it is not
used.
1
JTAG Test
Mode Select
TMS IS This pin functions as the JTAG test mode select.
1
JTAG Test Data
Input
TDI IS This pin functions as the JTAG data input.
1
JTAG Test Data
Out
TDO O12 This pin functions as the JTAG data output.
1
JTAG Test
Clock
TCK IS This pin functions as the JTAG test clock.
Table 2.3 Miscellaneous Pins
NUM
PINS NAME SYMBOL
BUFFER
TYPE DESCRIPTION
1
System Reset nRESET IS This active low pin allows external hardware to
reset the device.
Note: This pin should be tied high if it is not
used.
1
Ethernet
Full-Duplex
Indicator LED
nFDX_LED OD12
(PU)
This pin is driven low (LED on) when the Ethernet
link is operating in full-duplex mode.
General
Purpose I/O 0
GPIO0 IS/O12/
OD12
(PU)
This General Purpose I/O pin is fully programmable
as either a push-pull output, an open-drain output,
or a Schmitt-triggered input.