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9)
The device shall compare the CRC data received from the host with the results of its
own CRC calculation. If a miscompare error occurs during one or more Ultra DMA
bursts for any one command, at the end of the command, the device shall report the
first error that occurred (see 5.5.5).
10) The device shall release DDMARDY- within t
DMACK-.
11) The host shall neither negate STOP nor negate HSTROBE until at least t
negating DMACK-.
12) The host shall not assert DIOW-, CS0-, CS1-, DA2, DA1, or DA0 until at least t
after negating DMACK.
b) Device terminating an Ultra DMA data out burst
The following steps shall occur in the order they are listed unless otherwise specifically
allowed (see 5.6.3.11 and 5.6.3.2 for specific timing requirements):
1)
The device shall not initiate Ultra DMA burst termination until at least one data word
of an Ultra DMA burst has been transferred.
2)
The device shall initiate Ultra DMA burst termination by negating DDMARDY-.
3)
The host shall stop generating an HSTROBE edges within t
DDMARDY-.
4)
If the device negates DDMARDY- within t
HSTROBE edge, then the device shall be prepared to receive zero or one additional
data words. If the device negates DDMARDY- greater than t
generated an HSTROBE edge, then the device 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 device shall negate DMARQ no sooner than t
The device shall not assert DMARQ again until after the Ultra DMA burst is
terminated.
6)
The host shall assert STOP with t
shall not negate STOP again until after the Ultra DMA burst is terminated.
7)
If HSTROBE is negated, the host shall assert HSTROBE with t
negated DMARQ. No data shall be transferred during this assertion. The device shall
ignore this transition of HSTROBE. HSTROBE shall remain asserted until the Ultra
DMA burst is terminated.
8)
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
HSTROBE and STOP and the device has negated DMARQ and DDMARDY-, and no
sooner than t
10) The device shall latch the host's CRC data from DD (15:0) on the negating edge of
DMACK-.
5 - 82
timing for the host.
RFS
after the device has negated DMARQ. The host
LI
after placing the result of its CRC calculation on DD (15:0).
DVS
C141-E072-01EN
after the host has negated
IORDYZ
of the device negating
RFS
after the host has generated an
SR
after the host has
SR
after negating DDMARDY-.
RP
after the device has
LI
after the host has asserted
MLI
after
ACK
ACK
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