FDC37C672 View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
Manufacturer
FDC37C672 Datasheet PDF : 173 Pages
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Enhanced Super I/O Controller with Fast IR
Datasheet
DRIVE RATE
DRT1 DRT0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
Table 6.10 - Data Rates
DATA RATE
SEL1 SEL0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
DATA RATE
MFM FM
1Meg
---
500
250
300
150
250
125
1Meg
---
500
250
500
250
250
125
1Meg
---
500
250
2Meg
---
250
125
DENSEL
1
1
0
0
1
1
0
0
1
1
0
0
DRATE(1)
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
Drive Rate Table (Recommended) 00 = 360K, 1.2M, 720K, 1.44M and 2.88M Vertical Format
01 = 3-Mode Drive
10 = 2 Meg Tape
Note 1: The DRATE and DENSEL values are mapped onto the DRVDEN pins.
DT1 DT0
0
0
1
0
0
1
1
1
Table 6.11 - DRVDEN Mapping
DRVDEN1
(1)
DRATE0
DRATE0
DRATE0
DRATE1
DRVDEN0
(1)
DENSEL
DRATE1
nDENSEL
DRATE0
DRIVE TYPE
4/2/1 MB 3.5"
2/1 MB 5.25" FDDS
2/1.6/1 MB 3.5" (3-MODE)
PS/2
Table 6.12 - Default Precompensation Delays
DATA RATE
2 Mbps
(Note 6.1)
1 Mbps
500 Kbps
300 Kbps
250 Kbps
PRECOMPENSATION
DELAYS
20.8 ns
41.67 ns
125 ns
125 ns
125 ns
Note 6.1 The 2Mbps data rate is only available if VCC = 5V.
SMSC FDC37C672
Page 28
DATASHEET
Rev. 10-29-03
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