LAN9312 datasheet(196/458 Pages) SMSC

196 / 458 page

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

Revision 1.2 (04-08-08)

196

SMSC LAN9312

DATASHEET

14.2.3.4

LED Configuration Register (LED_CFG)

This read/write register configures the GPIO[7:0] pins as LED[7:0] pins and sets their functionality.

Note 14.2

The default value of this field is determined by the configuration strap LED_fun_strap[1:0].

Configuration strap values are latched on power-on reset or nRST de-assertion. Some

configuration straps can be overridden by values from the EEPROM Loader. Refer to

Section 4.2.4, "Configuration Straps," on page 40 for more information.

Note 14.3

The default value of this field is determined by the configuration strap LED_en_strap[7:0].

Configuration strap values are latched on power-on reset or nRST de-assertion. Some

configuration straps can be overridden by values from the EEPROM Loader. Refer to

Section 4.2.4, "Configuration Straps," on page 40 for more information.

Offset:

1BCh

Size:

32 bits

BITS

DESCRIPTION

TYPE

DEFAULT

31:10

RESERVED

9:8

LED Function 1-0 (LED_FUN[1:0])

These bits control the function associated with each LED pin as shown in

Table 13.1 of Section 13.3, "LED Operation," on page 164.

Note:

In order for these assignments to be valid, the particular pin must

be enabled as an LED output pin via the LED_EN[7:0] bits of this

R/W

Note 14.2

7:0

LED Enable 7-0 (LED_EN[7:0])

This field toggles the functionality of the GPIO[7:0] pins between GPIO and

LED.

0: Enables the associated pin as a GPIO signal

1: Enables the associated pin as a LED output

R/W

Note 14.3

LAN9312 Datasheet(PDF) 196 Page - SMSC Corporation

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