Advantech user manual AIMB-250 Series 2.4.14.1 Signal Description - Floppy Connector FLP

AIMB-250 Series

2.4.14.1 Signal Description – Floppy Connector (FLP)

Signal	Signal Description
RDATA	The read data input signal from the FDD.
WDATA	Write data. This logic low open drain writes pre-compensation serial data to the
	selected FDD. An open drain output.
WGATE	Write enable. An open drain output.
MOATSA	Motor A On. When set to 0, this pin enables disk drive 0. This is an open drain
	output.
MOTEB	Motor B On. When set to 0, this pin enables disk drive 1. This is an open drain
	output.
DRVSA	Drive Select A. When set to 0, this pin enables disk drive A. This is an open drain
	output.
DRVSB	Drive Select B. When set to 0, this pin enables disk drive B. This is an open drain
	output.
SIDE1	This output signal selects side of the disk in the selected drive.
	Direction of the head step motor. An open drain output
DIR	Logic 1 = outward motion
	Logic 0 = inward motion
STEP	Step output pulses. This active low open drain output produces a pulse to move
	the head to another track.
REDWC	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.
TK00	Track 0. This Schmitt-triggered input from the disk drive is active low when the
	head is positioned over the outermost track.
INDEX	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.
WPT	Write protected. This active low Schmitt input from the disk drive indicates that the
	diskette is write-protected.
DSKCHG	Diskette change. This signal is active low at power on and whenever the diskette is
	removed.

44 AIMB-250 Series User’s Manual