w83697 Winbond Electronics Corp America, w83697 Datasheet - Page 151

• Manufacturer Part Number: w83697
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

CRF2 (Default 0xFF)
CRF4 (Default 0x00)
FDD0 Selection:
CRF5 (Default 0x00)
FDD1 Selection: Same as FDD0 of CRF4.
Bit 3 - 2 : Density Select
Bit 1
Bit 0:
Bit 7 - 6 : FDD D Drive Type
Bit 5 - 4 : FDD C Drive Type
Bit 3 - 2 : FDD B Drive Type
Bit 1 - 0 : FDD A Drive Type
Bit 7:
Bit 6
Bit 5
Bit 4 - 3 : DRTS1, DRTS0: Data Rate Table select (Refer to TABLE A).
Bit 2
Bit 1:0
= 00 Normal (Default)
= 01 Normal
= 10 1 ( Forced to logic 1)
= 11 0 ( Forced to logic 0)
: DISFDDWR
= 0
= 1
SWWP
= 0
= 1
Reserved.
: Pre-comp Disable.
= 1
= 0
: Reserved.
= 00 Select Regular drives and 2.88 format
= 01 3-mode drive
= 10 2 Meg Tape
= 11 Reserved
: Reserved.
: DTYPE0, DTYPE1: Drive Type select (Refer to TABLE B).
Enable FDD write.
Disable FDD write(forces pins WE, WD stay high).
Normal, use WP to determine whether the FDD is write protected or not.
FDD is always write-protected.
Disable FDC Pre-compensation.
Enable FDC Pre-compensation.
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Publication Release Date: Feb. 2002
W83697HF/F
Revision 0.70