WDTR is used only to negotiate width (8 or 16 bit).
SDTR can be used to negotiate up to Ultra-2 speeds.
PPR subsumes the capabilities of both WDTR and SDTR and can negotiate speeds of up to Ultra-640. It can also set various parameters, such as Information Units, Quick Arbitration Select and Double Transition clocking.
NATIONAL INSTITUTES OF HEALTH ISSUES GRANTS NOTICE ON "ANCILLARY DOMAIN VALIDATION PATIENT-REPORTED OUTCOMES MEASUREMENT INFORMATION SYSTEM (PROMIS) STUDIES (R01)"
Feb 09, 2012; WASHINGTON, Feb. 6 -- National Institutes of Health issues modification to previous grants notice Information System) domains...