Fujitsu MHL2300AT, MHM200AT, MHM2100AT, MHM215OAT C141-E104-02EN 5-111

5.6 Timing
C141-E104-02EN 5-111
5.6.3.2 Ultra DMA data burst timing requirements
Table 5.18 Ultra DMA data burst timing requirements (1 of 2)
NAME MODE 0
(in ns) MODE 1 (in ns) MODE 2 (in ns) MODE 3 (in ns) MODE 4 (in ns) COMMENT
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX (see Notes 1 and 2)
t2CYCTYP 240 160 120 90 60 Typical sustained average two cycle
time
tCYC 112 73 54 39 25 Cycle time allowing for asymmetry
and clock variations (from
STROBE edge to STROBE edge)
t2CYC 230 154 115 86 57 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 15 10 7 7 5 Data setup time (at recipient)
(see Note 4)
tDH 5 5 5 5 5 Data hold time (at recipient)
(see Note 4)
tDVS 70 48 30 20 6 Data valid setup time at send er (from
data valid until STROBE edge)
(see Note 5)
tDVH 6 6 6 6 6 Data valid hold time at sender (from
STROBE edge until data may
become invalid) (see Note 5)
tFS 0 230 0 200 0 170 0 130 0 120 First STROBE time (for device to
first negate DSTROBE from STOP
during a data in burst)
tLI 0 150 0 150 0 150 0 100 0 100 Limited interlock time (see Note 3)
tMLI 20 20 20 20 20 Interlock time with minimum
(see Note 3)
tUI 0 0 0 0 0 Unlimited interlock time (see Note 3)
tAZ 10 10 10 10 10 Maximum time allowed for output
drivers to release (from asserted or
negated)
tZAH 20 20 20 20 20 Mini m u m d e l a y t i m e re q u i r e d
for output
tZAD 0 0 0 0 0 Drivers t o assert or negate (from
released)
tENV 20 70 20 70 20 70 20 55 20 55 Envelope time (from DMACK- to
STOP and HDMARDY- during
data in burst initiation and from
DMACK to STOP during data out
burst initiation)
tSR 50 30 20 NA NA STROBE-to-DMARDY-time (if
DMARDY- is negated before this long
after STROBE edge, the recipient shall
receive no more than one additional
data word)
tRFS 75 70 60 60 60 Ready-to-Final-STROBE time
(After negating DMARDY-,
STROBE edges should not be sent
beyond this period)
tRP 160 125 100 100 100 Ready-to-pause time (that recipient
shall wait to pause after negating
DMARDY-)
tIORDYZ 20 20 20 20 20 Maximum tim e befo re rel easin g IORDY