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

13.1 Low Address

Register Name: Low Address

I/O Index: 0h

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Low Address

8 bit 7:0

16 bit 8:1

R/W:00000000

Register Per: socket

Register Compatibility Type: DMA

Bit 2

Bit 1

Bit 0

This register is used to form part of the address for DMA transfers. This register corresponds to the Base

and Current Address register of the Intel 8237 for write operations. For read operations this register

contains the current address.

Bits 7:0 — Low Address

When bits 2:1 of the DMA Slave Configuration register indicate that an 8-bit transfer is to occur,

this register contains the starting address bits 7:0. If bits 2:1 of the DMA Slave Configuration

register indicate that a 16-bit transfer is to occur, then this register contains starting address bits

8:1 and address 0 is always ‘0’ at the PC Card.

13.2 Mid Low Address

Register Name: Mid Low Address

I/O Index: 1h

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Mid Low Address

8 bit 15:8

16 bit 16:9

R/W:00000000

Register Per: socket

Register Compatibility Type: DMA

Bit 2

Bit 1

Bit 0

This register is used to form part of the address for DMA transfers.

Bits 7:0 — Mid Low Address

This register corresponds to the Base and Current Address register of the Intel 8237 for write operations.

For read operations this register contains the current address. When bits 2:1 of the DMA Slave

Configuration register indicate that an 8-bit transfer is to occur, this register contains the starting

address bits 15:8. If bits 2:1 of the DMA Slave Configuration register indicate that a 16-bit

transfer is to occur, then this register contains the starting address bits 16:9.

172

DMA OPERATION REGISTERS

ADVANCE DATA BOOK v0.3

June 1998

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