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3)
The device shall stop generating DSTROBE edges within t
HDMARDY-.
4)
If the host negates HDMARDY- within t
DSTROBE edge, then the host shall be prepared to receive zero or one additional data
words.
generated a DSTROBE edge, then the host shall be prepared to receive zero, one or
two additional data words. The additional data words are a result of cable round trip
delay and t
5)
The host shall resume an Ultra DMA burst by asserting HDMARDY-.
5.5.3.4 Terminating an Ultra DMA data in burst
a) Device terminating an Ultra DMA data in burst
The following steps shall occur in the order they are listed unless otherwise specifically
allowed (see 5.6.3.5 and 5.6.3.2 for specific timing requirements):
1)
The device shall initiate termination of an Ultra DMA burst by not generating
DSTROBE edges.
2)
The device shall negate DMARQ no sooner than t
DSTROBE edge. The device shall not assert DMARQ again until after the Ultra
DMA burst is terminated.
3)
The device shall release DD (15:0) no later than t
4)
The host shall assert STOP within t
shall not negate STOP again until after the Ultra DMA burst is terminated.
5)
The host shall negate HDMARDY- within t
The host shall continue to negate HDMARDY- until the Ultra DMA burst is
terminated. Steps (4) and (5) may occur at the same time.
6)
The host shall drive DD (15:0) no sooner than t
DMARQ. For this step, the host may first drive DD (15:0) with the result of its CRC
calculation (see 5.5.5):
7)
If DSTROBE is negated, the device shall assert DSTROBE within t
has asserted STOP. No data shall be transferred during this assertion. The host shall
ignore this transition on DSTROBE. DSTROBE shall remain asserted until the Ultra
DMA burst is terminated.
8)
If the host has not placed the result of its CRC calculation on DD (15:0) since first
driving DD (15:0) during (6), the host shall place the result of its CRC calculation on
DD (15:0) (see 5.5.5).
9)
The host shall negate DMACK- no sooner than t
DSTROBE and negated DMARQ and the host has asserted STOP and negated
HDMARDY-, and no sooner than t
calculation on DD (15:0).
If the host negates HDMARDY- greater than t
timing for the device.
RFS
C141-E090-01EN
after the device has generated a
SR
after generating the last
SS
after negating DMARQ.
AZ
after the device has negated DMARQ. The host
LI
after the device has negated DMARQ.
LI
after the device has negated
ZAH
after the device has asserted
MLI
after the host places the result of its CRC
DVS
of the host negating
RFS
after the device has
SR
after the host
LI
5 - 77
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