FDC37C669-MT SMSC, FDC37C669-MT Datasheet - Page 33

• 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

CONFIGURATION CONTROL REGISTER (CCR)
Address 3F7 WRITE ONLY
PC/AT and PS/2 Modes
BIT 0 and 1 DATA RATE SELECT 0 and 1
These bits determine the data rate of the floppy controller.
PS/2 Model 30 Mode
BIT 0 and 1 DATA RATE SELECT 0 and 1
These bits determine the data rate of the floppy controller.
BIT 2 NO PRECOMPENSATION
This bit can be set by software, but it has no functionality.
register mode. Unaffected by software reset.
See Table 13 for the appropriate values.
See Table 13 for the appropriate values.
It can be read by bit 2 of the DSR when in Model 30
RESET
COND.
RESET
COND.
N/A
N/A
7
7
N/A
N/A
6
6
N/A
N/A
5
5
N/A
N/A
4
4
33
N/A
N/A
3
3
BIT 2 - 7 RESERVED
Should be set to a logical "0"
BIT 3 - 7 RESERVED
Should be set to a logical "0"
Table 13 shows the state of the DENSEL pin. The
DENSEL pin is set high after a hardware reset and is
unaffected by the DOR and the DSR resets.
NOPREC DRATE
N/A
N/A
2
2
DRATE
SEL1
SEL1
1
1
1
1
DRATE
DRATE
SEL0
SEL0
0
0
0
0