Intel® Core™ Ultra 200H and 200U Series Processors

Datasheet, Volume 1 of 2

ID Date Version Classification
842704 05/27/2025 Public
Document Table of Contents

WAIT States from eSPI device

There are situations when the device cannot predict the length of the command packet from the controller. For non-posted transactions, the device 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 device after the TAR cycles.