CDI EMS 4, User Manual

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Signal Timing
Figure 1-1
shows a timing chart for the case where the host device triggers a data transfer by
asserting the active-low request signal (/REQ). The gage then sends data (the DATA signal) that
is clocked by the CK line. In this case, the data ready (RDY) line is not applicable.
Figure 1-2 shows a timing chart for the case where the gage asserts its active-low data ready
signal (/RDY) to indicate that a new gage measurement is available. This triggers a data
transfer that is initiated by the host device.
Data Ordering