USB97CFDC2-MV-01 Standard Microsystems (SMSC), USB97CFDC2-MV-01 Datasheet - Page 8

• Manufacturer Part Number: USB97CFDC2-MV-01
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB97CFDC2-MV-01

• Lead Free Status / RoHS Status: Supplier Unconfirmed

5
SMSC DS – USB97CFDC2-01
PIN DESCRIPTIONS
PIN NO.
75
69
71
67
68
76
63
77
70
73
72
74
64
65
Read Disk
Data
Write
Data
Head
Select
Direction
Control
Step Pulse
Disk Change
DRVDEN 0
DRVDEN 1
Write Gate
Track 0
Index
Write Protect nWRTPRT
Motor On 0
Drive Select 0 nDS0
NAME
nRDATA
nWDATA
nHDSEL
nDIR
nSTEP
nDSKCHG
DRVDEN 0
DRVDEN1
nWGATE
nTRK0
nINDEX
nMTR0
SYMBOL
FLOPPY DISK INTERFACE
DATASHEET
BUFFER
TYPE
OD12
OD12
OD12
OD12
OD12
OD12
OD12
OD12
OD12
IS
IS
IS
IS
IS
Page 8
Raw serial bit stream from the disk drive, low
active.
transition of the encoded data.
This active low high current driver provides the
encoded data to the disk drive. Each falling edge
causes a flux transition on the media. This pin is
high impedance when nRESET is active low.
This high current output selects the floppy disk
side for reading or writing. A logic "1" on this pin
means side 0 will be accessed, while a logic "0"
means side 1 will be accessed. . This pin is high
impedance when nRESET is active low.
This high current low active output determines the
direction of the head movement. A logic "1" on this
pin means outward motion, while a logic "0" means
inward motion. This pin is high impedance when
nRESET is active low.
This active low high current driver issues a low
pulse for each track-to-track movement of the
head. This pin is high impedance when nRESET is
active low.
This input senses that the drive door is open or
that the diskette has possibly been changed since
the last drive selection.
An active low on this pin indicates a disk drive
spindle speed change from 300 RPM to 360 RPM
or 1.2M format disks in three mode drives. This
pin should be tied to the disk drives spindle speed
control input pin. This pin is high impedance when
nRESET is active low.
This active low high current driver allows current to
flow through the write head. It becomes active just
prior to writing to the diskette. This pin is high
impedance when nRESET is active low.
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 pin is high impedance when nRESET
is active low.
This pin is high impedance when nRESET is active
low.
Reserved for future use.
This active low Schmitt Trigger input senses from
This active low open drain output selects drive 0.
Each falling edge represents a flux
DESCRIPTION
Rev. 02-27-07