FDC37C669_07 SMSC [SMSC Corporation], FDC37C669_07 Datasheet - Page 8

• Manufacturer Part Number: FDC37C669_07
• Description: PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support
• Manufacturer: SMSC [SMSC Corporation]

PIN NO.
TQFP
QFP/
4,3
2,5
17
14
13
12
18
88
7
8
1
Direction
Control
nStep Pulse
Disk Change
nDrive Select
O,1
nMotor On 0,1
DRVDEN0
nWrite
Protected
wTrack 00
nIndex
DRVDEN1
Receive Data 2
NAME
DESCRIPTION OF PIN FUNCTIONS
nDIR
nSTEP
nDSKCHG
nDS0,1
nMTR0,1
DRVDEN0
nWRTPRT
nTRK00
nINDEX
DRVDEN 1
RXD2/IRRX
SYMBOL
SERIAL PORT INTERFACE
BUFFER
TYPE
OD48
OD48
OD48
OD48
OD48
OD48
IS
IS
IS
IS
I
8
This
determines the direction of the head
movement. A logic "1" on this pin means
outward motion, while a logic "0" means
inward motion.
This active low high current driver issues a
low pulse for each track-to-track movement
of the head.
This input senses that the drive door is open
or that the diskette has possibly been
changed since the last drive selection. This
input is inverted and read via bit 7 of I/O
address 3F7H.
Active low open drain outputs select drives
0-1.
These active low open drain outputs select
motor drives 0-1.
Indicates the drive and media selected.
Refer to configuration registers CR03,
CR0B, CR1F.
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 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.
Indicates the drive and media selected.
Refer to configuration registers CR03,
CR0B, CR1F.
Receiver serial data input for port 2. IR
Receive Data
high
current
DESCRIPTION
low
active
output