600 Series Chipset Family Platform Controller Hub

Datasheet, Volume 1 of 2

ID 648364
Date 05/10/2022
Document Table of Contents

WAIT States from eSPI Slave

There are situations when the slave cannot predict the length of the command packet from the master (PCH). For non-posted transactions, the slave is allowed to respond with a limited number of WAIT states.

A WAIT state is a 1-byte response code. They must be the first set of response byte from the slave after the TAR cycles.