w83637hg Winbond Electronics Corp America, w83637hg Datasheet - Page 115

• Manufacturer Part Number: w83637hg
• Description: Winbond Lpc I/o Lpc I/o
• Manufacturer: Winbond Electronics Corp America

8.3.2 Logical Device 1 (Parallel Port)
CR30 (Default 0x01 if PNPCSV = 0 during POR, default 0x00 otherwise)
CR60, CR 61 (Default 0x03, 0x78 if PNPCSV = 0 during POR, default 0x00, 0x00 otherwise)
These two registers select Parallel Port I/O base address.
[0x100:0xFFC] on 4 byte boundary (EPP not supported) or
[0x100:0xFF8] on 8 byte boundary (all modes supported, EPP is only available when the base address
is on 8 byte boundary).
CR70 (Default 0x07 if PNPCSV = 0 during POR, default 0x00 otherwise)
CR74 (Default 0x04)
CRF0 (Default 0x3F)
Bit 7 - 1 : Reserved.
Bit 0
Bit 7 - 4 : Reserved.
Bit [3:0] : These bits select IRQ resource for Parallel Port.
Bit 7 - 3 : Reserved.
Bit 2 - 0 : These bits select DRQ resource for Parallel Port.
Bit 7
Bit 6 - 3 : ECP FIFO Threshold.
Bit 2 - 0 : Parallel Port Mode (CR28 PRTMODS2 = 0)
= 1 Activates the logical device.
= 0 Logical device is inactive.
: Reserved.
= 100
= 000
= 001
= 101
= 010
= 011
= 111
0x00 = DMA0
0x01 = DMA1
0x02 = DMA2
0x03 = DMA3
0x04 - 0x07= No DMA active
Printer Mode (Default)
Standard and Bi-direction (SPP) mode
EPP - 1.9 and SPP mode
EPP - 1.7 and SPP mode
ECP mode
ECP and EPP - 1.9 mode
ECP and EPP - 1.7 mode.
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Publication Release Date: March, 2006
W83637HF/HG
Revision 1.6