Accessing Flash Memory Cards - USB Mass Storage: Designing and Programming Devices and Embedded Hosts - page 84

Table 4-3: Timing requirements for MultiMediaCards on a bus with 10 or
fewer cards.
Parameter Symbol Minimum

(nsec.)

Maximum
(nsec.)

Clock low time TWL 10 -

Clock high time TWH 10 -

Clock rise time TTLH - 10

Clock fall time TTHL - 10

Input set-up time TISU 3 -

Input hold time TIH 3 -

Output set-up time TOSU 5 -

Output hold time TOH 5 -

Figure 4-2: A MultiMediaCard data reads data on SCLK's rising edge and
writes data that the MultiMediaCard host can read on SCLK's rising edge.