FDC37C78-HT Standard Microsystems (SMSC), FDC37C78-HT Datasheet - Page 8

• Manufacturer Part Number: FDC37C78-HT
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37C78-HT

• Package Type: TQFP
• Lead Free Status / RoHS Status: Compliant

PIN NO.
25,
26
28
15
16
17
36
37
34
35
Media ID0,
Media ID1
Write Gate
Track 0
Index
nWrite Protected
nMotor On 0
nDrive Select 0
nMotor On 1
Idle
nDrive Select 1
Powerdown
NAME
MEDIA_ID0,
MEDIA_ID1
nWGATE
nTRK0
nINDEX
nWRTPRT
nMTR0
nDS0
nMTR1
IDLE
nDS1
PD
DESCRIPTION OF PIN FUNCTIONS
SYMBOL
BUFFER
TYPE
OD20
OD20
OD20
OD20
OD20
OD20
OD20
IS
IS
IS
I
8
In Floppy Enhanced Mode 2 - These bits are
the Media ID 0,1 inputs. The value of these
bits can be read as bits 6 and 7 of the Floppy
Tape Register.
This active low high current driver allows
current to flow through the write head.
becomes active just prior to writing to the
diskette.
This active low Schmitt Trigger input senses
from the disk drive that the head is positioned
over the outermost track.
This active low Schmitt Trigger input senses
from the disk drive that the head is positioned
over the beginning of a track, as marked by
an index hole.
This active low Schmitt Trigger input senses
from the disk drive that a disk is write
protected. Any write command is ignored.
This active low open drain output selects
motor drive 0.
This active low open drain output selects drive
0.
This active low open drain output select motor
drive 0.
This pin indicates that the part is in the IDLE
state and can be powered down. Whenever
the part is in this state, IDLE pin is active
high. If the part is powered down by the Auto
Powerdown Mode, IDLE pin is set high and if
the part is powered down by setting the DSR
POWERDOWN bit (direct), IDLE pin is set
low.
This active low open drain output selects drive
0.
This pin is active high whenever the part is in
powerdown
POWERDOWN bit (direct) or via the Auto
Powerdown Mode. This pin can be used to
disable an external oscillator’s output.
DESCRIPTION
state,
either
via
DSR
It