w83627hg Winbond Electronics Corp America, w83627hg Datasheet - Page 92

• Manufacturer Part Number: w83627hg
• Description: Winbond Lpc I/o
• Manufacturer: Winbond Electronics Corp America

CRF0 °Default 0x0E±
FDD Mode Register
3 - 2
BIT
7
6
5
4
1
0
FIPURDWN
This bit controls the internal pull-up resistors of the FDC input pins RDATA, INDEX,
TRAK0, DSKCHG, and WP.
0š The internal pull-up resistors of FDC are turned on.°Default±
1š The internal pull-up resistors of FDC are turned off.
INTVERTZ
This bit determines the polarity of all FDD interface signals.
0š FDD interface signals are active low.
1š FDD interface signals are active high.
DRV2EN °PS2 mode only±
When this bit is a logic 0, indicates a second drive is installed and is reflected in status
register A.
Swap Drive 0, 1 Mode
0š No Swap °Default±
1š Drive and Motor sel 0 and 1 are swapped.
Interface Mode
11š AT Mode °Default±
10š Reserved
01š PS/2
00š Model 30
FDC DMA Mode
0š Burst Mode is enabled
1š Non-Burst Mode °Default±
Floppy Mode
0š Normal Floppy Mode °Default±
1š Enhanced 3-mode FDD
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DESCRIPTION
W83627HF/ F/ HG/ G