Intel PCI User Manual

334

This register indicates the length of the first wakeup packet received. It is valid if one of the bits in 
the Wakeup Status Register (WUSR) is set. It can be written for diagnostic purposes and is not 

cleared by any reset.

This register is read-only and it is used to store the first 128 bytes of the wakeup packet for 

software retrieval after system wakeup. It can be written for diagnostic purposes and is not cleared 
by any reset.

The Flexible Filter Length Table stores the minimum packet lengths required to pass each of the 

Flexible Filters. Any packets that are shorter than the programmed length won’t pass that filter. 
Each Flexible Filter considers a packet that doesn’t have any mismatches up to that point to have 

passed the Flexible Filter when it reaches the required length. It does not check any bytes past that 

point.

All reserved fields read as 0b’s and ignore writes.

Reserved

Length

LEN

11:0

X

Length of wakeup packet. (If jumbo frames is enabled and the 
packet is longer than 2047 bytes this field is 2047.)

WUPD

WUPD

31:0

X

Wakeup Packet Data