FDC37C669-MT SMSC, FDC37C669-MT Datasheet - Page 70

• 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

In this mode, the Floppy Disk Control signals are
available on the parallel port pins. When this mode is
selected, the parallel port is not available. There are two
modes of operation, PPFD1 and PPFD2. These modes
can be selected in Configuration Register 4. PPFD1 has
only drive 1 on the parallel port pins; PPFD2 has drive 0
and 1 on the parallel port pins.
PPFD1: Drive 0 is on the FDC pins
PPFD2: Drive 0 is on the Parallel port pins
When the PPFDC is selected the following pins are set as
follows:
1.
2.
3.
nDACK: Assigned to the parallel port device during
configuration.
PDRQ (assigned to the parallel port): not ECP =
high-Z, ECP & dmaEn = 0, ECP & not dmaEn =
high-Z
IRQ assigned to the parallel port: not active, this is
hi-Z or Low depending on settings.
Drive 1 is on the Parallel port pins
Drive 1 is on the Parallel port pins
PARALLEL PORT FLOPPY DISK CONTROLLER
70
The following parallel port pins are read as follows by a
read of the parallel port register:
1.
2.
3.
The following FDC pins are all in the high impedence
state when the PPFDC is actually selected by the drive
select register:
1.
2.
The FDC signals are muxed onto the Parallel Port pins as
shown in Table 32.
Data Register (read) = last Data Register (write)
Control Register are read as "cable not connected"
STROBE, AUTOFD and SLC = 0 and nINIT = 1;
Status Register reads: nBUSY = 0, PE = 0, SLCT =
0, nACK = 1, nERR = 1.
nWDATA, DENSEL, nHDSEL, nWGATE, nDIR,
nSTEP, nDS1, nDS0, nMTRO, nMTR1.
If PPFDx is selected, then the parallel port can not
be used as a parallel port until "Normal" mode is
selected.