LPC47M112 Datasheet, PDF (33/208 Pages) SMSC Corporation – ENHANCED SUPER I/O CONTROLLER WITH LPC INTERFACE

Enhanced Super I/O Controller with LPC Interface
Datasheet
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 9 - 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 10 - Default Precompensation Delays
DATA RATE
2 Mbps
1 Mbps
500 Kbps
300 Kbps
250 Kbps
PRECOMPENSATION
DELAYS
20.8 ns
41.67 ns
125 ns
125 ns
125 ns
SMSC DS – LPC47M112
Page 33
DATASHEET
Rev. 02/02/2005