SECURE ACCESS FOR SYSTEM POWER MANAGEMENT INTERFACE (SPMI) DURING BOOT
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United States of America
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Issued Date -
Feb 6, 2020
app pub date -
Aug 2, 2018
filing date -
Aug 2, 2018
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status (Latency Note)
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Abstract
A storage device is pre-loaded with an access block including a list of device addresses with which the device is either permitted or not permitted to communicate over a shared bus prior to a bootloader being initiated on the device. A communication circuit is coupled to the storage device, and the circuit is adapted to: (a) obtain a first command to be transmitted over the shared bus to a first device address; (b) determine whether the first device address is in the list of device addresses in the access block; and (c) allow or prevent transmission of the first command over the shared bus based on whether the firt device address is in the list of device addresses. The list of device addresses is bypassed or ignored after the bootloader procedure is completed.
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