Fujitsu MHT2020AT Manual Do Utilizador
Interface
5-132
C141-E192-01EN
5.6.3 Ultra DMA data transfer
Figures 5.11 through 5.20 define the timings associated with all phases of Ultra
DMA bursts.
DMA bursts.
Table 5.23 contains the values for the timings for each of the Ultra DMA Modes.
5.6.3.1 Initiating an Ultra DMA data in burst
5.6.3.2 contains the values for the timings for each of the Ultra DMA Modes.
Note:
The definitions for the STOP, HDMARDY-and DSTROBE signal lines are
not in effect until DMARQ and DMACK- are asserted.
not in effect until DMARQ and DMACK- are asserted.
Figure 5.11 Initiating an Ultra DMA data in burst
DMARQ
(device)
(device)
DMACK-
(host)
(host)
STOP
(host)
(host)
HDMARDY-
(host)
(host)
DSTROBE
(device)
(device)
DD (15:0)
DA0,DA1,DA2,
CS0-,CS1-
CS0-,CS1-
t
UI
t
ENV
t
FS
t
ENV
t
ZAD
t
FS
t
ZAD
t
DVH
t
AZ
t
ZIORDY
t
ACK
t
ACK
t
ACK
t
VDS
t
DZFS
t
ZFS