RTL8111C-VB-GR 查看數據表（PDF） - Realtek Semiconductor

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RTL8111C-VB-GR

INTEGRATED GIGABIT ETHERNET CONTROLLER FOR PCI EXPRESS™ APPLICATIONS

Realtek Semiconductor 

RTL8111C

Datasheet

6.7. Vital Product Data (VPD)

Bit 31 of the Vital Product Data (VPD) capability structure in the RTL8111C’s PCI Configuration Space

is used to issue VPD read/write commands and is also a flag used to indicate whether the transfer of data

between the VPD data register and the 93C46/93C56/93C66 has completed or not.

Write VPD register: (write data to the 93C46/93C56/93C66)

Set the flag bit to 1 at the same time the VPD address is written to write VPD data to EEPROM. When

the flag bit is reset to 0 by the RTL8111C, the VPD data (4 bytes per VPD access) has been transferred

from the VPD data register to EEPROM.

Read VPD register: (read data from the 93C46/93C56/93C66)

Reset the flag bit to 0 at the same time the VPD address is written to retrieve VPD data from EEPROM.

When the flag bit is set to 1 by the RTL8111C, the VPD data (4 bytes per VPD access) has been

transferred from EEPROM to the VPD data register.

Note1: Refer to the PCI 2.3 Specifications for further information.

Note2: The VPD address must be a DWORD-aligned address as defined in the PCI 2.3 Specifications. VPD

data is always consecutive 4-byte data starting from the VPD address specified.

Note3: Realtek reserves offset 60h to 7Fh in EEPROM mainly for VPD data to be stored.

Note4: The VPD function of the RTL8111C is designed to be able to access the full range of the

93C46/93C56/93C66 EEPROM.

Integrated Gigabit Ethernet Controller for PCI Express

16

Track ID: JATR-1076-21 Rev. 1.5

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