Table 11 - Data Rates
DATA RATE DATA RATE
DRIVE RATE
DENSEL (1)
DRATE (2)
DRT1
DRT0
SEL1
SEL0
MFM
FM
IDENT=1
IDENT=0
1
2
0
0
0
0
0
0
0
0
1
0
0
1
1
0
1
0
1Meg
500
---
1
1
0
0
0
0
1
1
1
0
0
1
1
0
1
0
250
150
125
300
250
0
0
0
0
1
1
1
1
1
0
0
1
1
0
1
0
1Meg
500
---
1
1
0
0
0
0
1
1
1
0
0
1
1
0
1
0
250
250
125
500
250
1
1
1
1
0
0
0
0
1
0
0
1
1
0
1
0
1Meg
500
---
250
---
1
1
0
0
0
0
1
1
1
0
0
1
1
0
1
0
2Meg
250
125
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:This is for DENSEL in normal mode.
Note 2:This is for DRATE0, DRATE1 when Drive Opt are 00.
Table 12 - Default Precompensation Delays
PRECOMPENSATION
DELAYS
DATA RATE
2 Mbps
1 Mbps
125 ns
41.67 ns
125 ns
125 ns
125 ns
500 Kbps
300 Kbps
250 Kbps
*The 2 Mbps data rate is only available if VCC = 5V.
28
SMSC [ SMSC CORPORATION ]
