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LPC47M182 Datasheet(PDF) 46 Page - SMSC Corporation

Part # LPC47M182
Description  ADVANCED I/O CONTROLLER WITH MOTHERBOARD GLUE LOGIC
PDF  223 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

LPC47M182 Datasheet(HTML) 46 Page - SMSC Corporation

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Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
Revision 1.8 SMSC/Non-SMSC Register Sets (02-24-05)
46
SMSC LPC47M182
DATASHEET
BIT 6 LOW POWER
A logic “1” written to this bit will put the floppy controller into manual low power mode. The floppy
controller clock and data separator circuits will be turned off. The controller will come out of manual low
power mode after a software reset or access to the Data Register or Main Status Register.
BIT 7 SOFTWARE RESET
This active high bit has the same function as the DOR RESET (DOR bit 2) except that this bit is self
clearing.
Separator circuits will be turned off. The controller will come out of manual low power.
Note: The DSR is Shadowed in the Floppy Data Rate Select Shadow Register, located at the offset 0x19 in the
Power Control Logical Device (when LD_NUM=0) or Runtime Register Block Logical Device (when LD_NUM=1).
Table 6.8 - Data Rates
DRIVE RATE
DATA RATE
DATA RATE
DRATE(1)
DRT1
DRT0
SEL1
SEL0
MFM
FM
DENSEL
1
0
0
0
1
1
1Meg
---
1
1
1
0
0
0
0
500
250
1
0
0
0
0
0
1
300
150
0
0
1
0
0
1
0
250
125
0
1
0
0
1
1
1
1Meg
---
1
1
1
0
1
0
0
500
250
1
0
0
0
1
0
1
500
250
0
0
1
0
1
1
0
250
125
0
1
0
1
0
1
1
1Meg
---
1
1
1
1
0
0
0
500
250
1
0
0
1
0
0
1
2Meg
---
0
0
1
1
0
1
0
250
125
0
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.
Table 6.9 - DRVDEN Mapping
DT1
DT0
DRVDEN1 (1)
DRVDEN0 (1)
DRIVE TYPE
0
0
DRATE0
DENSEL
4/2/1 MB 3.5”
2/1 MB 5.25” FDDS
2/1.6/1 MB 3.5” (3-MODE)
1
0
DRATE0
DRATE1
0
1
DRATE0
nDENSEL
PS/2
1
1
DRATE1
DRATE0



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