Fujitsu MPG3XXXAH-E Product Manual page 159

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
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
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
edge, then the device shall be prepared to receive zero or one additional data words. If
the device negates DDMARDY- greater than t
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
timing for the host.
5) The device shall negate DMARQ no sooner than t
device shall not assert DMARQ again until after the Ultra DMA burst is terminated.
6) The host shall assert STOP with t
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
and STOP and the device has negated DMARQ and DDMARDY-, and no sooner than
t after placing the result of its CRC calculation on DD (15:0).
DVS
10) The device shall latch the host's CRC data from DD (15:0) on the negating edge of
DMACK-.
5 - 92
IORDYZ
after the host has generated an HSTROBE
SR
SR
RP
after the device has negated DMARQ. The host shall
LI
after the host has asserted HSTROBE
MLI
C141-E116-01EN
after the host has negated DMACK-.
of the device negating
RFS
after the host has generated an
after negating DDMARDY-. The
after the device has
LI
after
ACK
after
ACK
RFS