Thank you for contacting Cypress Community.
The Read/Write transaction depends upon the HyperBus Specifications. Therefore, it will be same for both HyperFlash and HyperRam.
The S71KS512S supplement datasheet addresses only the Multi-Chip Package related differences from the HyperBus Specification and the individual HyperFlash and HyperRAM datasheets. For all other information related to the individual memories in the MCP, refer to the HyperBus, HyperFlash, and HyperRAM datasheets.
Thanks and Regards,