LAN9250 datasheet(23/421 Pages) MICROCHIP

23 / 421 page

 2015 Microchip Technology Inc.

DS00001913A-page 23

LAN9250

Note 5:

Configuration strap pins are identified by an underlined symbol name. Configuration strap values are

latched on power-on reset or RST# de-assertion. Refer to Section 7.0, "Configuration Straps," on page 54

for more information.

LED 0

LED0

VO12/

VOD12/

VOS12

This pin is configured to operate as an LED when

the LED 0 Enable bit of the LED Configuration Reg-

ister (LED_CFG) is set. The buffer type depends on

the setting of the LED Function 2-0 (LED_FUN[2:0])

field in the LED Configuration Register (LED_CFG)

and is configured to be either a push-pull or open-

drain/open-source output. When selected as an

open-drain/open-source output, the polarity of this

pin depends upon the MNGT0 strap value sampled

at reset.

Note:

Refer to Section 16.3, "LED Operation,"

on page 385 to additional information.

General

Purpose I/O 0

GPIO0

VIS/VO12/

VOD12

(PU)

This pin is configured to operate as a GPIO when

the LED 0 Enable bit of the LED Configuration Reg-

ister (LED_CFG) is clear. The pin is fully program-

mable as either a push-pull output, an open-drain

output or a Schmitt-triggered input by writing the

General Purpose I/O Configuration Register (GPI-

O_CFG) and the General Purpose I/O Data & Direc-

tion Register (GPIO_DATA_DIR).

Host Interface

Configuration

Strap 0

MNGT0

VIS

(PU)

This strap, along with MNGT1, MNGT2, and

MNGT3 configures the host mode. See Note 5.

See Table 7-3, “HBI Strap Mapping,” on page 61 for

the host interface strap settings.

Host Interface

Configuration

Strap 3

MNGT3

VIS

(PU)

This strap, along with MNGT0, MNGT1, and

MNGT2 configures the host mode. See Note 5.

See Table 7-3, “HBI Strap Mapping,” on page 61 for

the host interface strap settings.

Host Interface

Configuration

Strap 2

MNGT2

VIS

(PU)

This strap, along with MNGT0, MNGT1, and

MNGT3 configures the host mode. See Note 5.

See Table 7-3, “HBI Strap Mapping,” on page 61 for

the host interface strap settings.

TABLE 3-7:

GPIO, LED & CONFIGURATION STRAP PIN DESCRIPTIONS (CONTINUED)

Num

Pins

Name

Symbol

Buffer

Type

Description

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