Intel® Core™ Ultra Processor

Datasheet, Volume 1 of 2
Supporting Intel® Core™ Ultra Processor for U/H/U-Type4-series Platforms, formerly known as Meteor Lake

ID Date Version Classification
792044 03/05/2024 Public

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Document Table of Contents

ISH IPC

The ISH has IPC channels for communication with the Host Processor and Intel® CSME. The functions supported by the ISH IPC block are listed below.

Function 1: Allows for messages and interrupts to be sent from an initiator (such as the ISH) and a target (such as the Intel® CSME). The supported initiator -> target flows using this mechanism are shown in the table below.

IPC Initiator -> Target flows

Initiator

Target

ISH

Host processor

Host processor

ISH

ISH

Intel® CSME

Intel® CSME

ISH

Function 2: Provides status registers and remap registers that assist in the boot flow and debug. These are simple registers with dual access read/write support and cause no interrupts.