FDC37N869 View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
MFG CO.
FDC37N869
SMSC -> Microchip
'FDC37N869' PDF : 147 Pages View PDF
DRIVE RATE
SELECT
(CR0B)
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
DATA RATE
SELECT
(DSR)
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
Table 19 - Data Rates
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
(Note 1)
IDENT=1
IDENT=0
1
0
1
0
0
1
0
1
1
0
1
0
0
1
0
1
1
0
1
0
0
1
0
1
DRATE
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
Note 1: This is for DENSEL in normal mode (see section CR05 on page 108). The DENSEL pin is set high after
a hardware reset and is unaffected by the DOR and the DSR resets.
Table 20 - Drive Rate Table (Recommended)
DRIVE RATE
FORMAT
DRT1 DRT0 (see section CR0B on page 110 to program Drive Rate)
0
0
360K, 1.2M, 720K, 1.44M and 2.88M Vertical Format
0
1
3-Mode Drive
1
0
2 Meg Tape
Table 21 - Default Precompensation Delays
PRECOMPENSATION
DATA RATE
DELAYS
2 Mbps
125 ns
1 Mbps
41.67 ns
500 Kbps
125 ns
300 Kbps
125 ns
250 Kbps
125 ns
SMSC DS – FDC37N869
Page 28
Rev. 11/09/2000
Share Link: 