W83977EG-AW Datasheet, PDF (35/142 Pages) Nuvotem Talema – These products are not designed for use in life support appliances

W83977EF-AW/W83977EG-AW
TRAK0#(Bit 4):
This bit indicates the value of TRAK0# input.
HEAD (Bit 3):
This bit indicates the complement of HEAD# output.
0 side 0
1 side 1
INDEX#(Bit 2):
This bit indicates the value of INDEX# output.
WP#(Bit 1):
0
disk is write-protected
1
disk is not write-protected
DIR (Bit 0)
This bit indicates the direction of head movement.
0 outward direction
1 inward direction
In PS/2 Model 30 mode, the bit definitions for this register are as follows:
7 6 5 4 3 ²¹ 0
DIR#
WP
INDEX
HEAD#
TRAK0
STEP F/F
DRQ
INIT PENDING
INIT PENDING (Bit 7):
This bit indicates the value of the floppy disk interrupt output.
DRQ (Bit 6):
This bit indicates the value of DRQ output pin.
STEP F/F (Bit 5):
This bit indicates the complement of latched STEP# output.
TRAK0 (Bit 4):
This bit indicates the complement of TRAK0# input.
HEAD# (Bit 3):
This bit indicates the value of HEAD# output.
0 side 1
1 side 0
Publication Release Date: Apr. 2006
-33-
Revision 1.2