w83977ctf Winbond Electronics Corp America, w83977ctf Datasheet - Page 112

• Manufacturer Part Number: w83977ctf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

CRF5 (Default 0x00)
FDD1 Selection: Same as FDD0 of CRF4.
TABLE A
Note:Refer to CRF2 for SELDEN value in the cases when CRF0, bit0=1.
TABLE B
DMOD0
DRTS1
Drive Rate Table
0
0
1
0
0
1
1
Select
DRTS0
DMOD1
0
1
0
0
1
0
1
DRATE1
DRVDEN0(pin 2)
1
0
0
1
1
0
0
1
1
0
0
1
SELDEN
DRATE1
SELDEN
DRATE0
Data Rate
DRATE0
1
0
1
0
1
0
1
0
1
0
1
0
-103 -
DRVDEN1(pin 3)
Selected Data Rate
1Meg
1Meg
1Meg
2Meg
MFM
500K
300K
250K
500K
500K
250K
500K
250K
DRATE0
DRATE0
DRATE0
DRATE1
250K
150K
125K
250K
250K
125K
250K
125K
Publication Release Date: March 1999
FM
---
---
---
---
4/2/1 MB 3.5 ”“
2/1 MB 5.25”
2/1.6/1 MB 3.5 ” (3-MODE)
W83977EF/ CTF
CRF0 bit 0=0
SELDEN
PRELIMINARY
DRIVE TYPE
1
1
0
0
1
1
0
0
1
1
0
0
Revision A1