Integrated Sensor Hub (ISH)

The Integrated Sensor Hub (ISH) serves as the connection point for many of the sensors on a platform. The ISH is designed with the goal of “Always On, Always Sensing” and it provides the following functions to support this goal:

• Acquisition/sampling of sensor data.
• The ability to combine data from individual sensors to create a more complex virtual sensor that can be directly used by the firmware/OS.
• Low power operation through clock and power gating of the ISH blocks together with the ability to manage the power state of the external sensors.
• The ability to operate independently when the host platform is in a low power state (S0ix only).
• Ability to provide sensor-related data to other subsystems within the Processor , such as the Intel^® CSME.

The ISH consists of the following key components:

• A combined cache for instructions and data.
  • ROM space intended for the bootloader.
  • SRAM space for code and data.
• Interfaces to sensor peripherals (I²C, I³C, UART, SPI, GPIO).
• An interface to main memory.
• Out of Band signals for clock and wake-up control.
• Inter Process Communications to the Host and Intel^® CSME.
• Part of the PCI tree on the host.