LAN9500AI datasheet(80/213 Pages) MICROCHIP

80 / 213 page

LAN950x

DS00001875A-page 80

 2010 - 2015 Microchip Technology Inc.

Note 1: The descriptor type for the device descriptors specified in the EEPROM is a don't care and always overwrit-

ten by HW to 0x1.

The descriptor size for the device descriptors specified in the EEPROM is a don't care and always overwrit-

ten by HW to 0x12.

The descriptor type for the configuration descriptors specified in the EEPROM is a don't care and always

overwritten by HW to 0x2.

2: Descriptors specified in EEPROM having bcdUSB, bMaxPacketSize0, and bNumConfigurations fields

defined with values other than 0200h, 40h, and 1, respectively, will result in unwanted behavior and untow-

ard results.

3: EEPROM byte addresses past the indicated address can be used to store data for any purpose:

(LAN9500/LAN9500i ONLY): 1Dh

(LAN9500A/LAN9500Ai ONLY): 20h

Table 5-58 describes the configuration flags. The configuration flags override the affects of the RMT_WKP and PWR_-

SEL straps. If a configuration descriptor exists in the EEPROM it will override both the configuration flags and associated

straps.

Table 5-59 describes the GPIO PME flags (LAN9500A/LAN9500Ai ONLY).

1Dh

Full-Speed Configuration and Interface Descriptor Word Offset

1Eh

(LAN9500A/LAN9500Ai ONLY)

LSB of GPIO Wake 0-10 (GPIOWKn) field of General Purpose IO Wake Enable and

Polarity Register (GPIO_WAKE)

1Fh

(LAN9500A/LAN9500Ai ONLY)

MSB of GPIO Wake 0-10 (GPIOWKn) field of General Purpose IO Wake Enable and

Polarity Register (GPIO_WAKE)

20h

(LAN9500A/LAN9500Ai ONLY)

GPIO PME Flags

TABLE 5-58:

CONFIGURATION FLAGS

Bits

Description

7:6

RESERVED

5:4

(LAN9500A/LAN9500Ai ONLY, Otherwise RESERVED)

PHY Boost

Refer to the PHY Boost (PHY_BOOST) field of the Hardware Configuration Register (HW_CFG) on page

122 for permissible field values.

RESERVED

Remote Wakeup Support

0 = The device does not support remote wakeup.

1 = The device supports remote wakeup.

(LAN9500A/LAN9500Ai ONLY, Otherwise RESERVED)

LED Select

Refer to the LED Select (LED_SEL) bit of the LED General Purpose IO Configuration Register (LED_G-

PIO_CFG) on page 129 for bit function definitions.

Power Method

0 = The device is bus powered.

1 = The device is self powered.

TABLE 5-57:

EEPROM FORMAT (CONTINUED)

EEPROM Address

EEPROM Contents

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