CDA CD 60 Spezifikationen PDF herunterladen (Seite 75)

PCI CD and PCI CDa

Document Number: 008-00965-06 EDT Public Revision: I December 2004

Template: edt.dot

Page 75

Bit Description

A31–0 The address of the current DMA or the last used address if no DMA is currently

active.

Main DMA Next Address Register

Size 32-bit

I/O read-only

Address 0x04 + (channel number x 20 hex)

Access EDT_DMA_NXT_ADDR

Comments The scatter-gather DMA fills this register when required from the scatter-

gather DMA list.

Bit Description

A31–0 Read the starting address of the next DMA.

Main DMA Current Count and Control Register

Size 32-bit

I/O read-only

Address 0x08

Access EDT_DMA_CUR_CNT

Comments This register automatically copied from the main DMA next count and

control register after main DMA completes.

Bit Description

A31–16 Read-only versions of bits 31–16 of the scatter-gather DMA current count and

control register.

D15–0 The number of words still to be transferred in the current DMA.

1 2 ... 70 71 72 73 74 75 76 77 78 79 80 ... 90 91

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CDA CD 60 Spezifikationen Seite 75