600 Series Chipset Family Platform Controller Hub

Datasheet, Volume 1 of 2

ID Date Version Classification
648364 05/10/2022 Public
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.