SMSC LAN9512 - Manual (Page 10)

USB Hub with Integrated 10/100 Ethernet Controller
Datasheet
Revision 1.0 (04-20-09) 10 SMSC LAN9512
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. The
maximum operating frequency of this clock is
25MHz.
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.