QSPI Fast Read Resource Usage

Each qspi_flash_fast_read peripheral requires ports, clock blocks, compute time, and memory.

This page attempts to capture the requirements for each hardware type with relevant configurations.

Warning

Compute resource usage depends heavily on size of read operations performed.

Discrete Resources

Resource	Count
1b port	2
4b port	1
clock block	1
thread	<= 1

Note

All operation are performed in place, so thread count usage depends on the application’s use case.

Ports

Each qspi_flash_fast_read peripheral requires a 1-bit port SCLK, a 1-bit port CS, and a 4-bit port SIO.

Clock Blocks

Each qspi_flash_fast_read peripheral requires 1 clock block. This clock block is used to generate SCLK clock from the system frequency clock.

Threads

This library performs all operations in place and does not explicitly require a dedicated thread. The MIPS usage in a given thread varies heavily based on the SCLK frequency, frequency of flash reads, and size of flash reads.

Compute Requirements

This library has been evaluated to function at a minimum of 75 MIPs, the worst case scenario with a 600 MHz system frequency and all 8 cores scheduling operations.

Memory

The qspi_flash_fast_read library requires approximately 1.8 kB, split between <200 bytes data and <1600 bytes prog.

Each qspi_flash_fast_read peripheral context requires 36 bytes of data.