LAN89730 datasheet(87/218 Pages) MICROCHIP

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 2013-2015 Microchip Technology Inc.

DS60001348A-page 87

LAN89730

Table 4-57 describes the configuration flags. The configuration flags override the affects of the RMT_WKP strap. If a

Configuration Descriptor exists in the EEPROM it will override both the configuration flags and associated straps.

16h

Hi-Speed Device Descriptor Length (bytes)

17h

Hi-Speed Device Descriptor Word Offset

18h

Hi-Speed Configuration and Interface Descriptor Length (bytes)

19h

Hi-Speed Configuration and Interface Descriptor Word Offset

1Ah

Full-Speed Device Descriptor Length (bytes)

1Bh

Full-Speed Device Descriptor Word Offset

1Ch

Full-Speed Configuration and Interface Descriptor Length (bytes)

1Dh

Full-Speed Configuration and Interface Descriptor Word Offset

1Eh

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

Polarity Register (GPIO_WAKE)

1Fh

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

Polarity Register (GPIO_WAKE)

20h

GPIO PME Flags

Note:

The descriptor type for the Device Descriptors specified in the EEPROM is a don't care and always over-

written by HW to 0x1.

The descriptor size for the Device Descriptors specified in the EEPROM is a don't care and always over-

written 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.

Note:

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.

Note:

EEPROM byte addresses past 20h can be used to store data for any purpose.

TABLE 4-57:

CONFIGURATION FLAGS

Bits

Description

7:4

RESERVED

Remote Wakeup Support

0 = The device does not support remote wakeup.

1 = The device supports remote wakeup.

LED Select

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

O_CFG) for bit function definitions.

Power Method

0 = The device is bus powered.

1 = The device is self powered.

TABLE 4-56:

EEPROM FORMAT (CONTINUED)

EEPROM Address

EEPROM Contents

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