LPC47M142-NC Standard Microsystems (SMSC), LPC47M142-NC Datasheet - Page 86
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LPC47M142-NC
Manufacturer Part Number
LPC47M142-NC
Description
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.LPC47M142-NC.pdf
(205 pages)
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The register definitions are based on the standard IBM addresses for LPT. All of the standard printer ports are
supported. The additional registers attach to an upper bit decode of the standard LPT port definition to avoid conflict
with standard ISA devices. The port is equivalent to a generic parallel port interface and may be operated in that mode.
The port registers vary depending on the mode field in the ecr. The table below lists these dependencies. Operation of
the devices in modes other that those specified is undefined.
Note 1: These addresses are added to the parallel port base address as selected by configuration register or jumpers.
Note 2: All addresses are qualified with AEN. Refer to the AEN pin definition.
SMSC DS – LPC47M14X
data
ecpAFifo
dsr
dcr
cFifo
ecpDFifo
tFifo
cnfgA
cnfgB
ecr
*Refer to ECR Register Description
NAME
MODE
000
001
010
011
100
101
110
111
SPP mode
PS/2 Parallel Port mode
Parallel Port Data FIFO mode
ECP Parallel Port mode
EPP mode (If this option is enabled in the configuration registers)
Reserved
Test mode
Configuration mode
ADDRESS (Note 1)
+000h R/W
+001h R/W
+002h R/W
+400h R/W
+401h R/W
+402h R/W
+000h R/W
+400h R/W
+400h R/W
+400h R
Table 43 – ECP Register Definitions
Table 44 – Mode Descriptions
Page 86
DESCRIPTION*
ECP MODES
000-001
011
010
011
110
111
111
All
All
All
Data Register
ECP FIFO (Address)
Status Register
Control Register
Parallel Port Data FIFO
ECP FIFO (DATA)
Test FIFO
Configuration Register A
Configuration Register B
Extended Control Register
FUNCTION
Rev. 03/19/2001
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