W83627G Просмотр технического описания (PDF) - Winbond

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W83627G

Winbond LPC I/O

Winbond 

W83627HF/ F/ HG/ G

FDC Interface, continued.

SYMBOL

PIN

RDATA#

15

HEAD#

16

DSKCHG# 17

I/O

INcsu

OD24

INcsu

FUNCTION

The read data input signal from the FDD. This input pin is

pulled up internally by a 1 K ohm resistor. The resistor can be

disabled by bit 7 of L0-CRF0 （FIPURDWN）.

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 in-

ternally by a 1 K ohm resistor. The resistor can be disabled by

bit 7 of L0-CRF0 （FIPURDWN）.

6.3 Multi-Mode Parallel Port

The following pins have alternate functions (Printer Mode and Extension FDD Mode), which are se-

lected by CR28 and LD1-CRF0 setting.

SYMBOL

PIN

I/O

FUNCTION

SLCT

31

INts PRINTER MODE：

WE2#

OD12

An active high input on this pin indicates that the printer is se-

lected. Refer to the description of the parallel port for defini-

tion of this pin in ECP and EPP mode.

EXTENSION FDD MODE：

This pin is for Extension FDD B; its function is the same as

the WE# pin of FDC.

EXTENSION 2FDD MODE：

This pin is for Extension FDD A and B; its function is the

same as the WE# pin of FDC.

PE

32

INts PRINTER MODE：

WD2#

OD12

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.

EXTENSION FDD MODE：

This pin is for Extension FDD B; its function is the same as

the WD# pin of FDC.

EXTENSION 2FDD MODE：

This pin is for Extension FDD A and B; its function is the

same as the WD# pin of FDC.

- 15 -

Publication Release Date: June 09, 2006

Revision 2.27

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