Smsc LAN9512 User Manual download pdf (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

EEPROM Data

EEDI IS

(PD)

This pin is driven by the EEDO output of the

external EEPROM.

EEPROM Data

Out

EEDO O8 This pin drives the EEDI input of the external

EEPROM.

EEPROM Chip

Select

EECS O8 This pin drives the chip select output of the external

EEPROM.

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

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.

JTAG Test

Mode Select

TMS IS This pin functions as the JTAG test mode select.

JTAG Test Data

Input

TDI IS This pin functions as the JTAG data input.

JTAG Test Data

Out

TDO O12 This pin functions as the JTAG data output.

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

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.

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.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 45 46

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