W83877ATF Datasheet, PDF (38/191 Pages) Winbond – enhanced version from Winbonds most popular I/O chip W83877F

W83877ATF
7 6 5 4 3 21 0
0
DRATE0
DRATE1
PRECOMP0
PRECOMP1
PRECOMP2
POWER DOWN
S/W RESET
S/W RESET (Bit 7):
This bit is the software reset bit.
POWER-DOWN (Bit 6):
0 FDC in normal mode
1 FDC in power-down mode
PRECOMP2 PRECOMP1 PRECOMP0 (Bit 4, 3, 2):
These three bits select the value of write precompensation. The following tables show the
precompensation values for the combination of these bits.
PRECOM
210
000
001
010
011
100
101
110
111
PRECOMPENSATION DELAY
250K - 1Mbps
2 Mbps Tape drive
Default Delays
Default Delays
41.67 nS
20.8nS
83.34 nS
41.17nS
125.00 nS
62.5nS
166.67 nS
83.3nS
208.33 nS
104.2nS
250.00 nS
125.00nS
0.00 nS (disabled)
0.00nS (disabled)
DATA RATE
250 KB/S
300 KB/S
500 KB/S
1 MB/S
2 MB/S
DEFAULT PRECOMPENSATION DELAYS
125 nS
125 nS
125 nS
41.67 nS
20.8 nS
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Publication Release Date: April 1998
Version 0.51