CL-PD6833 View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CL-PD6833

PCI-to-CardBus Host Adapter

Cirrus Logic 

CL-PD6833

PCI-to-CardBus Host Adapter

13.8 DMA Command and Status

Register Name: DMA Command and Status

I/O Index: 8h

Bit 7

Bit 6

Bit 5

Bit 4

DACK Sense DREQ Sense

Extended

Write Select

Rotating

Priority

R:0

R:0

R:0

R:0

Bit 3

Compressed

Timing

R/W:0

Register Per: socket

Register Compatibility Type: DMA

Bit 2

Bit 1

Bit 0

Controller Address Hold Mem-to-Mem

Disable

Enable

Enable

R:0

R:0

R/W:0

Bit 0 — Mem-to-Mem Enable

Reads from this bit return terminal count.

Bit 1 — Address Hold Enable

Reads from this bit return terminal count.

Bit 2 — Controller Disable

This bit disables DMA transfers. Reads from this bit return terminal count.

Bit 3 — Compressed Timing

Reads from this bit return terminal count.

Bit 4 — Rotating Priority

Reads from this bit return the state of the PC Card DMA request line inverted.

Bit 5 — Extended Write Select

Reads from this bit return the state of the PC Card DMA request line inverted.

Bit 6 — DREQ Sense

Reads from this bit return the state of the PC Card DMA request line inverted.

Bit 7 — DACK Sense

Reads from this bit return the state of the PC Card DMA request line inverted.

June 1998

ADVANCE DATA BOOK v0.3

DMA OPERATION REGISTERS

175

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