FDC37C672QFP SMSC Corporation, FDC37C672QFP Datasheet - Page 28

• Manufacturer Part Number: FDC37C672QFP
• Description: ENHANCED SUPER I/O CONTROLLER WITH FAST IR
• Manufacturer: SMSC Corporation

Note 1:
Note 6.1 The 2Mbps data rate is only available if V
SMSC FDC37C672
Drive Rate Table (Recommended) 00 = 360K, 1.2M, 720K, 1.44M and 2.88M Vertical Format
The DRATE and DENSEL values are mapped onto the DRVDEN pins.
DRT1
DRIVE RATE
DT1
0
0
0
0
0
0
0
0
1
1
1
1
0
1
0
1
DRT0
DT0
0
0
1
1
0
0
0
0
1
1
1
1
0
0
0
0
Table 6.12 - Default Precompensation Delays
SEL1
DATA RATE
1
0
0
1
1
0
0
1
1
0
0
1
DRVDEN1
DRATE0
DRATE0
DRATE0
DRATE1
DATA RATE
(Note 6.1)
500 Kbps
300 Kbps
250 Kbps
2 Mbps
1 Mbps
(1)
Table 6.11 - DRVDEN Mapping
SEL0
DATASHEET
01 = 3-Mode Drive
10 = 2 Meg Tape
Table 6.10 - Data Rates
1
0
1
0
1
0
1
0
1
0
1
0
CC
1Meg
1Meg
1Meg
2Meg
MFM
= 5V.
500
300
250
500
500
250
500
250
Page 28
DATA RATE
DRVDEN0
nDENSEL
DENSEL
DRATE1
DRATE0
PRECOMPENSATION
(1)
DELAYS
41.67 ns
250
150
125
250
250
125
250
125
FM
20.8 ns
125 ns
125 ns
125 ns
---
---
---
---
4/2/1 MB 3.5"
2/1 MB 5.25" FDDS
2/1.6/1 MB 3.5" (3-MODE)
PS/2
DENSEL
1
1
0
0
1
1
0
0
1
1
0
0
DRIVE TYPE
Enhanced Super I/O Controller with Fast IR
DRATE(1)
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Rev. 10-29-03
Datasheet