Qualcomm Incorporated

Shubham Maheshwari

Rakesh Misra

Pawan Chhabra

Mayukh Mallik

Aspects of the present disclosure provide techniques and apparatus for transferring data, such as between power domains via a first in, first out (FIFO) queue. An example method of transferring data includes selecting, via a source multiplexer, a first memory location included in a FIFO queue and storing first data, where the source multiplexer and the FIFO queue are in a first power domain; outputting the first data to a first level shifter; calculating, in the first power domain, a first value based on the first data; outputting the first value to a second level shifter; selecting, via at least one destination multiplexer included in a second power domain, the first level shifter and the second level shifter; calculating, in the second power domain, a second value based on the first data; and comparing the first value to the second value to generate a result.

Ensuring data integrity in power domain crossing FIFO queues

A warm mission-mode reset may be performed in a portable computing device. Assertion of a signal indicating an error condition may be detected. In response to detection of the signal indicating an error condition, a signal indicating a request to preserve memory contents may be provided to a DRAM subsystem. Then, in response to a signal acknowledging the DRAM subsystem is preserving the memory contents, a system reset signal may be asserted.

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Jaipur, India

Shubham Maheshwari