W83627EHF_0611 Datasheet, PDF (108/144 Pages) Winbond – WINBOND LPC I/O

W83627EHF/EF, W83627EHG/EG
7.3 Logical Device 1 (Parallel Port)
CR 30h. (Default 01h)
BIT READ / WRITE
7~1 Reserved.
DESCRIPTION
0: Logical device is inactive.
0
R/W
1: Activate the logical device.
CR 60h, 61h. (Default 03h, 78h)
BIT READ / WRITE
DESCRIPTION
These two registers select PRT I/O base address.
7~0
R/W
<100h : FFCh> on 4 bytes boundary (EPP not supported) or
<100h : FF8h> on 8 bytes boundary (all modes supported, EPP is only
available when the base address is on 8 byte boundary).
CR 70h. (Default 07h)
BIT READ / WRITE
7~4 Reserved.
3~0
R/W
DESCRIPTION
These bits select IRQ resource for PRT.
CR 74h. (Default 04h)
BIT READ / WRITE
7~3 Reserved.
2~0
R/W
DESCRIPTION
These bits select DRQ resource for PRT.
000: DMA0. 001: DMA1. 010: DMA2.
1xx: No DMA active.
011: DMA3.
CR F0h. (Default 3Fh)
BIT READ / WRITE
7 Reserved.
6~3
R/W
2~0
R/W
DESCRIPTION
ECP FIFO Threshold.
Parallel Port Mode selection (CR28 bit2 PRTMODS2 = 0).
000: Standard and Bi-direction (SPP) mode.
001: EPP – 1.9 and SPP mode.
010: ECP mode.
011: ECP and EPP – 1.9 mode.
100: Printer Mode.
101: EPP – 1.7 and SPP mode.
110: Reserved.
111: ECP and EPP – 1.7 mode.
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