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W83627DHG
Publication Release Date: Aug, 22, 2007
-154- Version
1.4
12.3.7 TFIFO (Test FIFO Mode) Mode = 110
Data bytes may be read, written, or DMAed to or from the system to this FIFO in any direction. Data in
the tFIFO is not transmitted to the parallel port lines. However, data in the tFIFO may be displayed on
the parallel port data lines.
12.3.8 CNFGA (Configuration Register A) Mode = 111
This register is a read-only register. When it is read, 10h is returned indicating an 8-bit implementation.
12.3.9 CNFGB (Configuration Register B) Mode = 111
The bit definitions are as follows:
7 6 5 4 3 2 1 0
1 1 1
intrValue
compress
IRQx 0
IRQx 1
IRQx 2
Bit 7: This bit is read-only. It is logical 0 during a read, which means that this chip does not support
hardware RLE compression.
Bit 6: Returns the value on the ISA IRQ line to determine possible conflicts.
Bit 5-3: Reflects the IRQ resource assigned for ECP port.
CNFGB[5:3]
IRQ RESOURCE
000
Reflects other IRQ resources selected by PnP register (default)
001 IRQ7
010 IRQ9
011 IRQ10
100 IRQ11
101 IRQ14
110 IRQ15
111 IRQ5
Bit 2-0: These five bits are logical 1 during a read and can be written.
Содержание W83627DHG
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