Intel ECB-865 user manual Signal Description Floppy Connector J6, DRVDEN0/1#

User’s Manual

3.11.9Signal Description – Floppy Connector (J6)

RDATA#	The read data input signal from the FDD.
WD#	Write data. This logic low open drain writes pre-compensation serial data to the selected FDD.
	An open drain output.
WE#	Write enable. An open drain output.
MOA#	Motor A On. When set to 0, this pin enables disk drive 0. This is an open drain output.
MOB#	Motor B On. When set to 0, this pin enables disk drive 1. This is an open drain output.
DSA#	Drive Select A. When set to 0, this pin enables disk drive A. This is an open drain output.
DSB#	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.
DIR#	Direction of the head step motor. An open drain output
	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.
DRVDEN0/1#	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.
TRAK0#	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.
WP#	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.

32ECB-865 User’s Manual