FDC37C669-MT SMSC, FDC37C669-MT Datasheet - Page 7

• Manufacturer Part Number: FDC37C669-MT
• Description: IC CTRLR SUPER I/O FLPPY 100TQFP
• Manufacturer: SMSC

Specifications of FDC37C669-MT

• Controller Type: I/O Controller
• Interface: ISA Host
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 25mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1008

PIN NO.
37-40,
TQFP
QFP/
19,
27
57
16
10
11
9
7
Interrupt Request
A, C, D,
E, F,
Chip Select Input
Reset
nRead Disk Data
nWrite
Gate
nWrite
Data
nHead
Select
Direction
Control
NAME
IRQ_A
IRQ_C
IRQ_D
IRQ_E
IRQ_F
nCS
RESET
nRDATA
nWGATE
nWDATA
nHDSEL
nDIR
DESCRIPTION OF PIN FUNCTIONS
SYMBOL
FLOPPY DISK INTERFACE
BUFFER
TYPE
OD24
OD48
OD48
OD48
OD48
O24
IS
IS
I
7
The interrupt request from the logical device
or IRQIN is output on one of the IRQA-G
signals. Refer to the configuration registers
for more information.
If EPP or ECP Mode is enabled, this output is
pulsed low, then released to allow sharing of
interrupts.
When enabled, this active low pin serves as
an input for an external decoder circuit which
is used to qualify address lines above A10.
This active high signal resets the chip and
must be valid for 500 ns minimum. The effect
on the internal registers is described in the
appropriate
registers are not affected by this reset.
Raw serial bit stream from the disk drive, low
active.
transition of the encoded data.
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 high current driver provides the
encoded data to the disk drive. Each falling
edge causes a flux transition on the media.
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 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.
Each falling edge represents a flux
section.
DESCRIPTION
The
configuration
It