FDC37C669_07 SMSC [SMSC Corporation], FDC37C669_07 Datasheet - Page 28

• Manufacturer Part Number: FDC37C669_07
• Description: PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support
• Manufacturer: SMSC [SMSC Corporation]

Drive Rate Table (Recommended) 00 = 360K, 1.2M, 720K, 1.44M and 2.88M Vertical Format
Note 1:
Note 2:
DRT1
DRIVE RATE
0
0
0
0
0
0
0
0
1
1
1
1
This is for DENSEL in normal mode.
This is for DRATE0, DRATE1 when Drive Opt are 00.
DRT0
0
0
0
0
1
1
1
1
0
0
0
0
01 = 3-Mode Drive
10 = 2 Meg Tape
SEL1
DATA RATE
1
0
0
1
1
0
0
1
1
0
0
1
*The 2 Mbps data rate is only available if V
Table 12 - Default Precompensation Delays
SEL0
DATA RATE
1
0
1
0
1
0
1
0
1
0
1
0
500 Kbps
300 Kbps
250 Kbps
2 Mbps
1 Mbps
1Meg
1Meg
1Meg
2Meg
MFM
Table 11 - Data Rates
500
300
250
500
500
250
500
250
DATA RATE
28
250
150
125
250
250
125
250
125
FM
PRECOMPENSATION
---
---
---
---
DELAYS
41.67 ns
125 ns
125 ns
125 ns
125 ns
IDENT=1
1
1
0
0
1
1
0
0
1
1
0
0
DENSEL (1)
CC
= 5V.
IDENT=0
0
0
1
1
0
0
1
1
0
0
1
1
DRATE (2)
1
1
0
0
1
1
0
0
1
1
0
0
1
2
1
0
1
0
1
0
1
0
1
0
1
0