AT7601FG datasheet(16/35 Pages) AME

16 / 35 page

AME, Inc.

Printer Port Cotroller

AT7601F

Rev. B.02

5-3-1.8 Cnfg-B (Configuration Register B) Mode = 111

ADDRESS OFFSET = 400H

The bit definitions are as follows:

Bit 7 Compress: This bit is read only. During a read it is a low level. This means that this chip

does not support hardware RLE compression. It does support hardware de-compression!

Bit 6 IntrValue: Returns the value on the ISA IRQ line to determine possible conflicts.

Bits [3:0] Parallel Port IRQ

Refer to Table A.

Bits [2:0] Parallel Port DMA

Refer to Table B.

IRQ

SELECTED

CONFIG REG B

BITS 5:3

110

101

100

011

010

001

111

All Others

000

Table A

DMA

SELECTED

CONFIG REG B

BITS 2:0

011

010

001

All Others

000

Table B

5-3-1.9 ECR (Extended Control Register) Mode = all

ADDRESS OFFSET = 402H

This register controls the extended ECP parallel port functions.

Bit 7,6,5: These bits are Read/Write and select the Mode.

AT7601FG Datasheet(PDF) 16 Page - Analog Microelectronics

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