IoT RAM - SPI & QSPI PSRAM - 16Mb~128Mb Lowest Pin Count QSPI RAM, up to 166MB/s - STMicroelectronics
QSPI — Quad serial peripheral interface
Quad SPI Flash Memory
Quad SPI (QSPI) PSRAM SDR in SOP8 Package - AP Memory | Mouser
Quick Presentation: 128Mb to 1Gb Quad SPI FL-S NOR Flash Family FL-S = Cypress's 3.0-V, 65-nm NOR Flash Memory Family With MirrorBit®1 Technology The. - ppt video online download
Setting up AXI Quad SPI on Arty - FPGA - Digilent Forum
IoT RAM (QSPI SDR, QSPI DDR, OPI, HPI) in WLCSP - AP Memory | Mouser
What are the Differences of Single vs Dual vs Quad SPI? - Total Phase