Terminating An Ultra Dma Data Out Burst - Fujitsu MHR2010AT Product Manual

5.5.4.4 Terminating an Ultra DMA data out burst

a) Host terminating an Ultra DMA data out burst
The following stops shall occur in the order they are listed unless otherwise
specifically allowed (see 5.6.3.10 and 5.6.3.2 for specific timing
requirements):
1) The host shall initiate termination of an Ultra DMA burst by not
2) The host shall assert STOP no sooner than t
3) The device shall negate DMARQ within t
4) The device shall negate DDMARDY- with t
5) If HSTROBE is negated, the host shall assert HSTROBE with t
6) The host shall place the result of its CRC calculation on DD (15:0) (see
7) The host shall negate DMACK- no sooner than t
8) The device shall latch the host's CRC data from DD (15:0) on the
9) The device shall compare the CRC data received from the host with the
10) The device shall release DDMARDY- within t
11) The host shall neither negate STOP nor negate HSTROBE until at least
12) The host shall not assert DIOW-, CS0-, CS1-, DA2, DA1, or DA0 until
C141-E145-02EN
generating HSTROBE edges.
HSTROBE edge. The host shall not negate STOP again until after the
Ultra DMA burst is terminated.
The device shall not assert DMARQ again until after the Ultra DMA
burst is terminated.
STOP. The device shall not assert DDMARDY- again until after the
Ultra DMA burst termination is complete.
device has negated DMARQ. No data shall be transferred during this
assertion. The device shall ignore this transition on HSTROBE.
HSTROBE shall remain asserted until the Ultra DMA burst is
terminated.
5.5.5)
asserted HSTROBE and STOP and the device has negated DMARQ and
DDMARDY-, and no sooner than t
calculation on DD (15:0).
negating edge of DMACK-.
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).
negated DMACK-.
t after negating DMACK-.
ACK
at least t after negating DMACK.
ACK
5.5 Ultra DMA Feature Set
after it last generated an
SS
after the host asserts STOP.
LI
after the host has negated
LI
after the host has
MLI
after placing the result of its CRC
DVS
after the host has
IORDYZ
after the
LI
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