W83627HF Datasheet, PDF (19/185 Pages) Winbond – WINBOND I/O

W83627HF/F
1.2 FDC Interface, continued
SYMBOL PIN
HEAD#
16
DSKCHG#
17
I/O
OD₂₄
IN_cs
PRELIMINARY
FUNCTION
Head select. This open drain output determines which disk drive
head is active.
Logic 1 = side 0
Logic 0 = side 1
Diskette change. This signal is active low at power on and
whenever the diskette is removed. This input pin is pulled up
internally by a 1 KΩ resistor. The resistor can be disabled by bit 7
of L0-CRF0 (FIPURDWN).
1.3 Multi-Mode Parallel Port
The following pins have alternate functions, which are controlled by CR28 and L3-CRF0.
SYMBOL PIN
I/O
FUNCTION
SLCT
31
IN_t PRINTER MODE:
An active high input on this pin indicates that the printer is selected.
Refer to the description of the parallel port for definition of this pin
in ECP and EPP mode.
OD₁₂ EXTENSION FDD MODE: WE2#
This pin is for Extension FDD B; its function is the same as the
WE# pin of FDC.
OD₁₂ EXTENSION 2FDD MODE: WE2#
This pin is for Extension FDD A and B; its function is the same as
the WE# pin of FDC.
PE
32
IN_t PRINTER MODE:
An active high input on this pin indicates that the printer has
detected the end of the paper. Refer to the description of the
parallel port for the definition of this pin in ECP and EPP mode.
OD₁₂
OD₁₂
EXTENSION FDD MODE: WD2#
This pin is for Extension FDD B; its function is the same as the
WD# pin of FDC.
EXTENSION 2FDD MODE: WD2#
This pin is for Extension FDD A and B; its function is the same as
the WD# pin of FDC.
Publication Release Date: Jul 1999
-9-
Revision 0.53