Datasheet
SLCFxxxM2TU(I)(-x) CompactFlash Card
Datasheet
61000-07000-106, May 2011 31
Table 23: UDMA Timing Parameter Descriptions
Symbol
Parameter
t2CYCTYP
Typical sustained average two cycle time
tCYC
Cycle time allowing for asymmetry and clock variations (from STROBE edge to STROBE edge)
t2CYC
Two cycle time allowing for clock variations (from rising edge to next rising edge or from falling
edge to next falling edge of STROBE)
tDS
Data setup time at recipient (from data valid until STROBE edge)
tDH
Data hold time at recipient (from STROBE edge until data may become invalid)
tDVS
Data valid setup time at sender (from data valid until STROBE edge)
tDVH
Data valid hold time at sender (from STROBE edge until data may become invalid)
tCS
CRC word setup time at device
tCH
CRC word hold time device
tCVS
CRC word valid setup time at host (from CRC valid until -DMACK negation)
tCVH
CRC word valid hold time at sender (from -DMACK negation until CRC may become invalid)
tZFS
Time from STROBE output released-to-driving until the first transition of critical timing.
tDZFS
Time from data output released-to-driving until the first transition of critical timing.
tFS
First STROBE time (for device to first negate DSTROBE from STOP during a data in burst)
tLI
Limited interlock time
tMLI
Interlock time with minimum
tUI
Unlimited interlock time
tAZ
Maximum time allowed for output drivers to release (from asserted or negated)
tZAH
Minimum delay time required for output
tZAD
Drivers to assert or negate (from released)
tENV
Envelope time (from -DMACK to STOP and -HDMARDY during data in burst initiation and from
DMACK to STOP during data out burst initiation)
tRFS
Ready-to-final-STROBE time (no STROBE edges shall be sent this long after negation of -
DMARDY)
tRP
Ready-to-pause time (that recipient shall wait to pause after negating -DMARDY)
tIORDYZ
Maximum time before releasing IORDY
tZIORDY
Minimum time before driving IORDY
tACK
Setup and hold times for -DMACK (before assertion or negation)
tSS
Time from STROBE edge to negation of DMARQ or assertion of STOP (when sender
terminates a burst)