LAN9250 datasheet(55/421 Pages) MICROCHIP

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 2015 Microchip Technology Inc.

DS00001913A-page 55

LAN9250

HBI_ale_qualification_strap

HBI ALE Qualification Strap:

Configures the HBI interface to

qualify the ALEHI and ALELO signals with the CS signal.

0 = address input is latched with ALEHI and ALELO

1 = address input is latched with ALEHI and ALELO only

when CS is active

HBI_rw_mode_strap

HBI Read / Write Mode Strap:

Configures the HBI interface

for separate read & write signals or direction and enable sig-

nals.

0 = read & write

1 = direction & enable

HBI_cs_polarity_strap

HBI Chip Select Polarity Strap:

Configures the polarity of the

HBI interface chip select signal.

0 = active low

1 = active high

HBI_rd_rdwr_polarity_strap

HBI Read, Read / Write Polarity Strap:

Configures the polar-

ity of the HBI interface read signal.

0 = active low read

1 = active high read

Configures the polarity of the HBI interface read / write signal.

0 = read when 1, write when 0 (R/nW)

1 = write when 1, read when 0 (W/nR)

HBI_wr_en_polarity_strap

HBI Write, Enable Polarity Strap:

Configures the polarity of

the HBI interface write signal.

0 = active low write

1 = active high write

Configures the polarity of the HBI interface enable signal.

0 = active low enable

1 = active high enable

HBI_ale_polarity_strap

HBI ALE Polarity Strap:

Configures the polarity of the HBI

interface ALEHI and ALELO signals.

0 = active low strobe (address saved on rising edge)

1 = active high strobe (address saved on falling edge)

1588_enable_strap

1588 Enable Strap:

Configures the default value of the 1588

Enable (1588_ENABLE) bit in the 1588 Command and Con-

trol Register (1588_CMD_CTL).

TABLE 7-1:

SOFT-STRAP CONFIGURATION STRAP DEFINITIONS (CONTINUED)

Strap Name

Description

Pin / Default Value

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