Fujitsu MHM2100AT - Mobile 10 GB Hard Drive Product Manual page 189

Interface
Table 5.18 Ultra DMA data burst timing requirements (2 of 2)
NAME MODE 0 MODE 1
(in ns)
MIN MAX MIN
t 0 0
ZIORDY
t 20 20
ACK
t 50 50
SS
Notes:
1) Unless otherwise specified, timing parameters shall be measured at the connector of the sender or receiver to which the parameter
applies (see Note 5 for exceptions). For example, the sender shall stop generating STROBE edges t
DMARDY-. Both STROBE and DMARDY- timing measurements are taken at the connector of the sender.
2) All timing measurement switching points (low to high and high to low) shall be taken at 1.5 V.
3) t , t and t indicate sender-to-recipient or recipient-to-sender interlocks, i.e., one agent (either sender or recipient) is waiting for
UI MLI LI
the other agent to respond with a signal before proceeding. t
limited time-out that has a defined minimum. t
4) Special cabling shall be required in order to meet data setup (t
5) Timing for t and t shall be met for all capacitive loads from 15 to 40 pf where all signals have the same capacitive load value.
DVS DVH
5-112
MODE 2
(in ns) (in ns)
MAX MIN MAX MIN
0 0
20 20
50 50
is an unlimited interlock that has no maximum time value. t
UI
is a limited time-out that has a defined maximum.
LI
DS
MODE 3 MODE 4
(in ns) (in ns)
MAX MIN MAX (see Notes 1 and 2)
0 Minimum time before driving
IORDY
20 Setup and hold times for DMACK-
(before assertion or negation)
50 Time from STROBE edge to
negation of DMARQ or assertion of
STOP (when sender terminates a
burst)
) and data hold (t ) times in modes 3 and 4.
DH
COMMENT
after the negation of
RFS
is a
MLI
C141-E104-03EN