W83877TF Datasheet, PDF (25/154 Pages) Winbond – I/O chip disk drive adapter

W83877TF
1.4 FDC Interface, continued
SYMBOL PIN
MOA
79
MOB
80
DSA
83
DSB
84
VDD
15,
56
GND
25,
40
65,
90
I/O
OD₂₄
OD₂₄
OD₂₄
OD₂₄
FUNCTION
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.
+5 power supply for the digital circuitry.
Ground.
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Publication Release Date: March 1998
Version 0.61