← back to legend
Communication buses

QSPI

Quad SPI
SPI with 4 data lines instead of 1 — 4× the bandwidth. Used for flash memory.

How it looks

Drawing: this is not on CORE3588, so it is drawn
processorflashmemoryclockCSIO0 IO1 IO2 IO3
Quad SPI: four data wires instead of one. Not on CORE3588 (the module keeps its storage on board).

How it works

SPI, BUT FOUR LANES WIDEprocessorflashplain SPI: 1 bit per clock tickQSPI: 4 bits per tick, 4 times the speed

Where it fits

An extension of SPI, keeping SCK and CS.

← back to legend