LPC47M112 SMSC Corporation, LPC47M112 Datasheet - Page 145
LPC47M112
Manufacturer Part Number
LPC47M112
Description
ENHANCED SUPER I/O CONTROLLER WITH LPC INTERFACE
Manufacturer
SMSC Corporation
Datasheet
1.LPC47M112.pdf
(208 pages)
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Enhanced Super I/O Controller with LPC Interface
Datasheet
SMSC DS – LPC47M112
MSC_STS
Default = 0x00
N/A
Force Disk Change
Default = 0x01 on
VCC POR
Floppy
Select Shadow
UART1
Control Shadow
on VTR POR
NAME
Data
FIFO
Rate
REG OFFSET
(R/W)
(R/W)
(hex)
1C
1D
(R)
(R)
(R)
1E
1F
20
Miscellaneous Status Register
Bits[5:0] can be cleared by writing a 1 to their position
(writing a 0 has no effect).
Bit[0] Either Edge Triggered Interrupt Input 0 Status. This
bit is set when an edge occurs on the GP21 pin.
Bit[1] Either Edge Triggered Interrupt Input 1 Status. This
bit is set when an edge occurs on the GP22 pin.
Bit[2] Either Edge Triggered Interrupt Input 2 Status. This
bit is set when an edge occurs on the GP41 pin.
Bit[3] Either Edge Triggered Interrupt Input 3 Status. This
bit is set when an edge occurs on the GP43 pin.
Bit[4] Either Edge Triggered Interrupt Input 4 Status. This
bit is set when an edge occurs on the GP60 pin.
Bit[5] Either Edge Triggered Interrupt Input 5 Status. This
bit is set when an edge occurs on the GP61 pin.
Bit[7:6] Reserved. This bit always returns zero.
Reserved – reads return 0
Force Disk Change
Bit[0] Force Disk Change for FDC0
0=Inactive
1=Active
0=Inactive
1=Active
Force Change 0 and 1 can be written to 1 but are not
clearable by software.
Force Change 0 is cleared on nSTEP and nDS0
DSKCHG (FDC DIR Register, Bit 7) = (nDS0 AND Force
Change 0) OR (nDS1 AND Force Change 1) OR nDSKCHG
Setting either of the Force Disk Change bits active ‘1’ forces
the FDD nDSKCHG input active when the appropriate drive
has been selected.
Bit[7:2] Reserved
Floppy Data Rate Select Shadow
Bit[0] Data Rate Select 0
Bit[1] Data Rate Select 1
Bit[2] PRECOMP 0
Bit[3] PRECOMP 1
Bit[4] PRECOMP 2
Bit[5] Reserved
Bit[6] Power Down
Bit[7] Soft Reset
UART FIFO Control Shadow 1
Bit[0] FIFO Enable
Bit[1] RCVR FIFO Reset
Bit[2] XMIT FIFO Reset
Bit[3] DMA Mode Select
Bit[5:4] Reserved
Bit[6] RCVR Trigger (LSB)
Bit[7] RCVR Trigger (MSB)
Bit[1] Force Disk Change for FDC1
Force Change 1 is cleared on nSTEP and nDS1
Page 145
DESCRIPTION
Rev. 02/02/2005
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