Product specifications

VT1211 LPC SuperIO and Hardware Monitor
Revision 1.0 January 8, 2002 -7- Pinouts
Technologies, Inc.
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Floppy Disk Controller
Symbol Pin # Type Description
DRVB#
4O
Drive B Enable.
DRVA#
6O
Drive A Enable.
MTRA#
3O
Motor A Enable.
MTRB#
7O
Motor B Enable
HDSEL#
15 O
Side 1 Select.
DSEL0#
1O
Density Select 0. High for high data rates (500Kbps, 1Mbps), low for low data
rates (250Kbps, 300Kbps)
DSEL1# / MSO / OVOLT
120 O
Density Select 1.
STEP#
9O
Step Pulse. Used to step the head in or out.
DIR#
8O
Head Direction. Step in when low, out when high.
WGATE#
11 O
Write Gate. Low to enable write.
WDATA#
10 O
Write Serial Data. Serial data stream to the drive.
RDATA#
14 I
Read Serial Data. Serial data stream from the drive.
TRK0#
12 I
Track 0. Indicates that the head of the selected drive is on track 0.
INDEX#
2I
Index. Indicates the beginning of a disk track.
WPT#
13 I
Write Protect. Indicates that the disk in the selected drive is write-protected.
DSKCHG#
16 I
Disk Change. Indicates whether the drive door has been opened or a diskette has
been changed.
Parallel Port
Signal Name Pin # Type Description
SLCT / WGATE#
29 I / O
Printer Select. High indicates that the printer has been selected.
PE / WDATA#
30 I / O
Printer Paper End. Set high by the printer when it runs out of paper.
BUSY /MTR1#
31 I / O
Printer Busy. High indicates that the printer has a local operation in progress
and cannot accept data.
ACK# /DS1#
32 I / O
Printer Acknowledge. Low indicates that the printer has received a character
and is ready to accept another.
ERR# / HDSEL#
33 O / O
Printer Error. Low indicates that the printer has encountered an error. The
error message can be read from bit 3 of the printer status register.
SLCTIN# / STEP#
34 O / O
Printer Select Input. When low, the printer is selected. This signal is derived
from the complement of bit 3 of the printer control register.
PD7 /nc,
PD6 /nc,
PD5 /nc,
PD4 /DSKCHG#,
PD3 / RDATA#,
PD2 / WRTPRT#,
PD1 / TRK00#,
PD0 / INDEX#
35-42 IO / –
IO / –
IO / –
IO / I
IO / I
IO / I
IO / I
IO / I
Parallel Port Data Bus. This bus provides a byte-wide input or output to the
system. The eight (8) lines are held in a high impedance state when the port is
deselected.
PINIT# / DIR#
43 O / O
Printer Initialize. This signal is derived from bit 2 of the printer control register
andisusedtoinitializetheprinter.
AUTOFD# / DRVDEN0
44 O / O
Printer Auto Line Feed. This signal is derived from the complement of bit 1 of
the printer control register and is used to advance one line after each line is
printed.
STB# / nc
46 O / –
Printer Strobe. This signal is the complement of bit 0 of the printer control
register and is used to strobe the printing data into the printer.
As shown by the alternate functions above, in mobile applications the parallel port pins can optionally be selected to function as a
floppy disk interface for attachment of an external floppy drive using the parallel port connector.