Sharp FDD-412A - Page 38

i
“FDD412A/B
(5)
Data
write
>
Head
engage
off
>
Seek
(in
outer
direction)
IT SELECT 2°72 "= Te ee ee ree ee et ee
RE
ADY-N
hake
©
WRITE
GATE-N
pp
ERASE
GATE-N
es
_
>.
HEAD
ENGAGE-N
=,
STEP
mon
a
ee
a
ee
a) T1 > 580 us
To > O
Fig.
2.35
Head
Engage
Off/Seek
Timing
Chart
2.6 Interface
2.6.1 Connection of Floppy Disk Controller (FDC) to FDD
There are two types of FDC-to-FDD connection: daisy chain connection
(Fig. 2.36) and star chain connection (Fig. 2.37).
In
In
be
in
the daisy chain connection, one FDC can control up to 4 FDDs.
the daisy chain connection, the FDD at the signal cable end needs to
equipped with a terminator, while all FDDs must each have a terminator
the star chain connection.
feeren cable
x
*DC cable
Fig. 2.36 Daisy Chain Connection (up to 4 FDDs Configured)
—32—