Quantum FIREBALL PLUS AS 10.2 Product Manual page 76

ATA Bus Interface and ATA Commands
t Minimum time before driving IORDY (see note 4)
ZIORDY
t Setup and hold times for DMACK- (before assertion or negation)
ACK
t Time from STROBE edge to negation of DMARQ or assertion of STOP (when sender
SS
terminates a burst)
Notes: Notes: Notes: Notes:
1. The parameters t
sender interlocks, i.e., one agent (either sender or recipient) is waiting for the
other agent to respond with a signal before proceeding. t
interlock that has no maximum time value. t
a defined minimum. t
2. 80-conductor cabling will be required in order to meet setup (t
and hold (t
3. Timing for t
loads of 15 and 40 pf at the connector where the Data and STROBE
signals have the same capacitive load value. Due to reflections on the
cable, these timing measurements are not valid in a normally functioning
system.
4. For all modes the parameter t
fact that the host has a pull up on IORDY- giving it a known state when
released.
5. The parameters t
end of the cable only in a configuration with one device at the end of the
cable.
Figures 6-3 through 6-12 define the timings associated with all phases of Ultra DMA
bursts.
6-14 Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT
, t and t indicate sender-to-recipient or recipient-to-
UI MLI LI
is a limited time-out that has a defined maximum.
LI
, t ) times in modes greater than 2.
DH CH
, t , t and t
DVS DVH CVS CVH
ZIORDY
, and t for mode 5 are defined for a recipient at the
DS DH
is an unlimited
UI
is a limited time-out that has
MLI
will be met for lumped capacitive
may be greater than t
ENV
, t )
DS CS
due to the