Advantech AIMB-251 Series User Manual page 43

2.4.14.1 Signal Description – Floppy Connector (FLP)
Signal
RDATA
WDATA
WGATE
MOATSA
MOTEB
DRVSA
DRVSB
SIDE1
DIR
STEP
REDWC
TK00
INDEX
WPT
DSKCHG
The read data input signal from the FDD.
Write data. This logic low open drain writes pre-compensation serial data to the
selected FDD. An open drain output.
Write enable. An open drain output.
Motor A On. When set to 0, this pin enables disk drive 0. This is an open drain
output.
Motor B On. When set to 0, this pin enables disk drive 1. This is an open drain
output.
Drive Select A. When set to 0, this pin enables disk drive A. This is an open drain
output.
Drive Select B. When set to 0, this pin enables disk drive B. This is an open drain
output.
This output signal selects side of the disk in the selected drive.
Direction of the head step motor. An open drain output
Logic 1 = outward motion
Logic 0 = inward motion
Step output pulses. This active low open drain output produces a pulse to move
the head to another track.
This output indicates whether a low drive density (250/300kbps at low level) or a
high drive density (500/1000kbps at high level) has been selected.
Track 0. This Schmitt-triggered input from the disk drive is active low when the
head is positioned over the outermost track.
This Schmitt-triggered input from the disk drive is active low when the head is
positioned over the beginning of a track marked by an index hole.
Write protected. This active low Schmitt input from the disk drive indicates that the
diskette is write-protected.
Diskette change. This signal is active low at power on and whenever the diskette is
removed.
Signal Description
AIMB-251 Series User's Manual 43
User's Manual