FDC37C669-MS Standard Microsystems (SMSC), FDC37C669-MS Datasheet - Page 131

• Manufacturer Part Number: FDC37C669-MS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37C669-MS

• Pin Count: 100
• Lead Free Status / RoHS Status: Compliant

CR1F
This register can only be accessed in the Configuration
Mode and after the CSR has been initialized
1FH. The default value
DTx = Drive Type select
CR20
This register can only be accessed in the Configuration
Mode and after the CSR has been initialized to 20H.
The default value of this register after power up is 3CH.
floppy disk controller (FDC). The FDC can
This register is used to select the base address of the
ADR9
DT0
DB7
D7
FDD3
Note:
ADR8
DB6
DT1
0
0
1
1
D6
DT0
DENSEL, DRATE1 and DRATE0 map onto two output pins DRVDEN0 and DRVDEN1.
0
1
0
1
DT1
ADR7
DB5
DT0
D5
FDD2
DENSEL
DRATE1
nDENSEL
DRATE0
DRVDEN0
(Note)
ADR6
DB4
DT1
D4
DRATE0
DRATE0
DRATE0
DRATE1
DRVDEN1
to
(Note)
ADR5
DB3
DT0
131
D3
of this register after power up is 00H.
indicates the Drive Type used for each drive. Refer to
CR0B for Data Rate Table register.
be set to 48 locations, on 16 byte boundaries from
100H-3F0H. To disable the FDC, set ADR9 and ADR8
to zero.
Upper Address Decode requirements: nCS='0' and
A10='0' are required to access the FDC registers. A[3:0]
are decoded as 0XXXb.
FDD1
4/2/1 MB 3.5"
2/1 MB 5.25" FDDS
2/1.6/1 MB 3.5" (3-MODE)
PS/2
ADR4
DB2
DT1
D2
Drive Type
DB1
DT0
D1
0
FDD0
DB0
DT1
D0
0
This register