FDC37C665GT-MS SMSC, FDC37C665GT-MS Datasheet - Page 36
FDC37C665GT-MS
Manufacturer Part Number
FDC37C665GT-MS
Description
IC CTRLR SUPER I/O MULTI 100-QFP
Manufacturer
SMSC
Datasheet
1.FDC37C665GT-MS.pdf
(152 pages)
Specifications of FDC37C665GT-MS
Controller Type
I/O Controller
Interface
ISA Host
Voltage - Supply
4.5 V ~ 5.5 V
Current - Supply
35mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
100-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
638-1007
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
FDC37C665GT-MS
Manufacturer:
Microchip Technology
Quantity:
10 000
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DIGITAL INPUT REGISTER (DIR)
Address 3F7 READ ONLY
This register is read-only in all modes.
PC-AT Mode
BIT 0 - 6 UNDEFINED
The data bus outputs D0 - 6 will remain in a
high impedance state during a read of this
register.
PS/2 Mode
BIT 0 nHIGH DENS
This bit is low whenever the 500 Kbps or 1 Mbps
data rates are selected, and high when 250Kbps
and 300Kbps are selected.
BITS 1 - 2 DATA RATE SELECT
These bits control the data rate of the floppy
controller.
corresponding to the individual data rates. The
data rate select bits are
RESET
COND.
RESET
COND.
See Table 13 for the settings
CHG
DSK
CHG
N/A
DSK
N/A
7
7
unaffected
N/A
N/A
6
1
6
N/A
N/A
5
1
5
by
a
N/A
36
N/A
4
1
4
BIT 7 DSKCHG
This bit monitors the pin of the same name and
reflects the opposite value seen on the disk
cable.
software reset, and are set to 250kb/s after a
hardware reset.
BITS 3 - 6 UNDEFINED
Always read as a logic "1"
BIT 7 DSKCHG
This bit monitors the pin of the same name and
reflects the opposite value seen on the disk
cable.
N/A
N/A
3
1
3
DRATE
SEL1
N/A
N/A
2
2
DRATE
SEL0
N/A
N/A
1
1
nHIGH
DENS
N/A
0
1
0
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