LAN9353 Datasheet, PDF (490/523 Pages) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

LAN9353
17.4.1 LED CONFIGURATION REGISTER (LED_CFG)
Offset:
1BCh
Size:
32 bits
This read/write register configures the GPIO[5:0] pins as LED pins and sets their functionality.
Bits
31:11
10:8
7:6
5:0
Description
RESERVED
LED Function 2-0 (LED_FUN[2:0])
These bits control the function associated with each LED pin as shown in
Section 17.3, "LED Operation," on page 486.
Note:
In order for these assignments to be valid, the particular pin must
be enabled as an LED output pin via the LED_EN bits of this
register.
RESERVED
LED Enable 5-0 (LED_EN[5:0])
This field toggles the functionality of the GPIO[5:0] pins between GPIO and
LED.
0: Enables the associated pin as a GPIO signal
1: Enables the associated pin as a LED output
When configured as LED outputs, the pins are either push-pull or open-drain/
open-source outputs and the pull-ups and input buffers are disabled. Push-
pull is selected when LED_FUN[2:0] = 111b, otherwise, they are open-drain/
open-source. When open-drain/open-source, the polarity of the pins depends
upon the strap value sampled at reset. If a high is sampled at reset, then this
signal is active low.
Note:
The polarity is determined by the strap value sampled on reset (a
hard-strap) and not the soft-strap value (of the shared strap) set via
EEPROM.
When configured as a GPIO output, the pins are configured per the General
Purpose I/O Configuration Register (GPIO_CFG) and the General Purpose I/
O Data & Direction Register (GPIO_DATA_DIR). The polarity of the pins
does not depend upon the strap value sampled at reset.
Type
RO
R/W
RO
R/W
Default
-
Note 1
-
Note 2
Note 1: The default value of this field is determined by the configuration strap LED_fun_strap[2:0].
Note 2: The default value of this field is determined by the configuration strap LED_en_strap[5:0].
DS00001925A-page 490
 2015 Microchip Technology Inc.