LPC47M172_07 SMSC [SMSC Corporation], LPC47M172_07 Datasheet - Page 100

• Manufacturer Part Number: LPC47M172_07
• Description: Advanced I/O Controller with Motherboard GLUE Logic
• Manufacturer: SMSC [SMSC Corporation]

Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
Note 1:
Note 2:
7.12.1 Data and ecpAFifo Port
SMSC/Non-SMSC Register Sets (Rev. 01-11-07)
These addresses are added to the parallel port base address as selected by configuration register or
jumpers.
All addresses are qualified with AEN. Refer to the AEN pin definition.
*Refer to ECR Register Description
ADDRESS OFFSET = 00H
Modes 000 and 001 (Data Port)
The Data Port is located at an offset of ‘00H’ from the base address. The data register is cleared at
initialization by RESET. During a WRITE operation, the Data Register latches the contents of the data
bus. The contents of this register are buffered (non inverting) and output onto the PD0 - PD7 ports.
During a READ operation, PD0 - PD7 ports are read and output to the host CPU.
Mode 011 (ECP FIFO - Address/RLE)
A data byte written to this address is placed in the FIFO and tagged as an ECP Address/RLE. The
hardware at the ECP port transmits this byte to the peripheral automatically. The operation of this register
is only defined for the forward direction (direction is 0). Refer to the ECP Parallel Port Forward Timing
Diagram, located in the Timing Diagrams section of this data sheet .
ecpDFifo
ecpAFifo
NAME
cnfgA
cnfgB
cFifo
data
tFifo
dsr
dcr
ecr
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
+000h R/W
+001h R/W
+002h R/W
+400h R/W
+400h R/W
+400h R/W
+401h R/W
+402h R/W
+400h R
Table 7.4 - ECP Register Definitions
Table 7.5 - Mode Descriptions
DATASHEET
Page 100
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
SMSC LPC47M172