FDC37C665GT_07 SMSC [SMSC Corporation], FDC37C665GT_07 Datasheet - Page 8

• Manufacturer Part Number: FDC37C665GT_07
• Description: High-Performance Multi-Mode Parallel Port Super I/O Floppy Disk Controllers
• Manufacturer: SMSC [SMSC Corporation]

PIN NO.
4,3
2,5
17
98
97
96
99
7
8
nDirection
Control
nStep Pulse
nDisk Change
nDrive Select
O,1
nDrive Select 2
nDrive Select 3
PDIR
nDrive Select 3
I/O Address 10
nMotor On 0,1
nMotor On 2
nMotor On 3
NAME
DESCRIPTION OF PIN FUNCTIONS
nDIR
nSTEP
nDSKCHG
nDS0,1
nDS2
nDS3
PDIR
nDS3
A10
nMTR0,1
nMTR2
nPDACK
nMTR3
PDRQ
SYMBOL
BUFFER
TYPE
OD48
OD48
OD48
OD48
OD48
OD48
OD48
OD48
0D48
O24
O4
IS
I
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. Refer to Note 2.
Active low open drain output selects drives
2. Refer to Note 2.
In non-ECP mode: Active low open drain
output selects drive 3. Refer to Note 2.
This bit is used to indicate the direction of
the Parallel Port data bus. 0 = output/write
1 = input/read
In non-ECP mode: Active low open drain
output selects drive 3. Refer to Note 2.
In ECP Mode, this pin is the A10 address
input.
These active low open drain outputs select
motor drives 0-1. Refer to Note 1.
Motor On 2: Refer to Note 1.
In ECP Mode, nMTR2 is the Parallel Port
DMA Acknowledge input. Active Low.
Motor On 3: Refer to Note 1.
In ECP Mode, MTR3 is the Parallel Port
DMA Request output. Active High.
high
current
DESCRIPTION
low
active
output