F84045 Asiliant Technologies, F84045 Datasheet - Page 121
F84045
Manufacturer Part Number
F84045
Description
Manufacturer
Asiliant Technologies
Datasheet
1.F84045.pdf
(173 pages)
Specifications of F84045
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Port 3F7 is a special case. Here D0:6 come from the IDE controller, and D7 comes from the floppy controller. To
accomplish this, a special input pin is used to provide bit 7. Normally this pin is connected to SD7. The difference is
that SDEN# goes high to disable the SD bus buffers, and D7 is internally taken from the P3F7D7 pin instead of XD7.
The IDE controller will provide data on XD0:7. XD0:6 will be used, and XD7 ignored. The P3F7D7 pin is an input
only, as this port is only an input. If a write occurs to 3F7 it occurs as normal, and SDEN# & IDEEN# will both be
active.
Revision 1.0
SBHE(A2)#
IDECS0#
IDEIOR#
IDEEN#
XD0:7
MA0:7/XD8:15
IDEIOW#
IDEEN#
XD0:7
MA0:7/XD8:15
ADS#
RDY#
XA0,1
IDECS0#
IDEIOR,IOW#
SBHE(A2)#
ADS#
RDY#
XA0,1
2/10/95
Default (MA)
Default (MA)
address setup
Figure 5.17: Fast IDE Programmable Parameters
T1
Figure 5.16: Basic Fast IDE Timing.
Subject to change without notice
command active
T2
IDE data
IDE data
command inactive
120
T3
IDE data
IDE data
Preliminary
Functional Description
(MA)
(MA)
CS4041
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