LPC47N237-MD SMSC [SMSC Corporation], LPC47N237-MD Datasheet - Page 59
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LPC47N237-MD
Manufacturer Part Number
LPC47N237-MD
Description
3.3V I/O CONTROLLER FOR PORT REPLICATORS AND DOCKING STATIONS
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.LPC47N237-MD.pdf
(138 pages)
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3.3v I/O Controller for Port Replicators and Docking Stations
SMSC DS – LPC47N237
BIT 3 dmaEn
Read/Write
1:
0:
BIT 2 serviceIntr
Read/Write
1:
0:
case dmaEn=1:
case dmaEn=0 direction=0:
case dmaEn=0 direction=1:
BIT 1 full
Read only
1:
0:
BIT 0 empty
Read only
1:
0:
Enables DMA (DMA starts when serviceIntr is 0).
Disables DMA unconditionally.
Disables DMA and all of the service interrupts.
Enables one of the following 3 cases of interrupts. Once one of the 3 service interrupts has occurred
serviceIntr bit shall be set to a 1 by hardware. It must be reset to 0 to re-enable the interrupts. Writing
this bit to a 1 will not cause an interrupt.
The FIFO cannot accept another byte or the FIFO is completely full.
The FIFO has at least 1 free byte.
The FIFO is completely empty.
The FIFO contains at least 1 byte of data.
During DMA (this bit is set to a 1 when terminal count is reached).
This bit shall be set to 1 whenever there are writeIntrThreshold or more bytes free in the FIFO.
This bit shall be set to 1 whenever there are readIntrThreshold or more valid bytes to be read from
the FIFO.
DATASHEET
Page 59
Revision 0.3 (10-26-04)
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