w83977atf Winbond Electronics Corp America, w83977atf Datasheet - Page 138

• Manufacturer Part Number: w83977atf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

CRF2 (Default 0xFF)
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
When FDD is in enhanced 3-mode(CRF0.bit0=1),these bits determine SELDEN value in TABLE A
of CRF4 and CRF5 as follows.
Note: X means don't care.
DTYPE1
0
0
0
0
0
1
1
DPYTE0
0
0
0
0
1
0
1
DRATE1
X
X
1
0
0
1
0
- 138.1 -
DRATE0
X
X
1
0
1
0
1
SELDEN
Publication Release Date: Auguest 1997
1
1
0
0
0
1
0
W83977ATF
PRELIMINARY
Revision 0.51