Intel® 700 Series Chipset Family Platform Controller Hub

Datasheet, Volume 1 of 2

ID Date Version Classification
743835 12/22/2023 Public

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WAIT States from eSPI Target Device

There are situations when the target device cannot predict the length of the command packet from the master (PCH). For non-posted transactions, the target 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 target device after the TAR cycles.