LAN9500AI datasheet(130/213 Pages) MICROCHIP

130 / 213 page

LAN950x

DS00001875A-page 130

 2010 - 2015 Microchip Technology Inc.

Note 7-11

The default value for this bit is 0 when no EEPROM is present. If a EEPROM is present, the default

value is the value of the LED Select bit in the Configuration Flags of the EEPROM. A USB Reset or

Lite Reset (LRST) will cause this bit to be restored to the image value last loaded from EEPROM, or

to be set to 0 if no EEPROM is present.

Note 7-12

(LAN9500/LAN9500i ONLY):

nLNKA_LED (Ethernet link activity LED)

(LAN9500A/LAN9500Ai ONLY):

Determined by LED Select (LED_SEL) setting.

Note 7-13

(LAN9500/LAN9500i ONLY):

nFDX_LED (Ethernet full-duplex LED)

(LAN9500A/LAN9500Ai ONLY):

Determined by LED Select (LED_SEL) setting.

Note 7-14

The default value depends on the state of the GPIO pin.

17:16

GPIO 8 Control (GPCTL8)

The value of this field determines the function of the external GPIO8 pin as

follows:

00 = GPIO8

01 = Note 7-13

10 = RXD2

11 = CRS

Note:

When enabled as RXD2 or CRS, the external device pin will reflect

the state of the corresponding internal MII signal. This feature is

useful as a diagnostic tool.

R/W

00b

15:11

RESERVED

10:8

GPIO Buffer Type (GPBUF[10:8])

When set, the output buffer for the corresponding GPIO signal is configured

as a push/pull driver. When cleared, the corresponding GPIO signal is

configured as an open-drain driver. Bits are assigned as follows:

GPBUF8 – bit 8

GPBUF9 – bit 9

GPBUF10 – bit 10

R/W

000b

RESERVED

6:4

GPIO Direction (GPDIR[10:8])

When set, enables the corresponding GPIO as an output. When cleared the

GPIO is enabled as an input. Bits are assigned as follows:

GPDIR8 – bit 4

GPDIR9 – bit 5

GPDIR10 – bit 6

R/W

000b

RESERVED

2:0

GPIO Data (GPD[10:8])

When enabled as an output, the value written is reflected on GPIOn. When

read, GPIOn reflects the current state of the corresponding GPIO pin. Bits

are assigned as follows:

GPD8 – bit 0

GPD9 – bit 1

GPD10 – bit 2

R/W

Note 7-14

Bits

Description

Type

Default

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