DS31256 datasheet(29/183 Pages) MAXIM

29 / 183 page

DS31256 256-Channel, High-Throughput HDLC Controller

29 of 183

4.6 HDLC Registers (4xx)

OFFSET/

ADDRESS

NAME

SECTION

0400

RHCDIS

Receive HDLC Channel Definition Indirect Select

7.2

0404

RHCD

Receive HDLC Channel Definition

7.2

0410

RHPL

Receive HDLC maximum Packet Length. One per device.

7.2

0480

THCDIS

Transmit HDLC Channel Definition Indirect Select

7.2

0484

THCD

Transmit HDLC Channel Definition

7.2

4.7 BERT Registers (5xx)

OFFSET/

ADDRESS

NAME

SECTION

0500

BERTC0

BERT Control 0

6.6

0504

BERTC1

BERT Control 1

6.6

0508

BERTRP0

BERT Repetitive Pattern Set 0 (lower word)

6.6

050C

BERTRP1

BERT Repetitive Pattern Set 1 (upper word)

6.6

0510

BERTBC0

BERT Bit Counter 0 (lower word)

6.6

0514

BERTBC1

BERT Bit Counter 1 (upper word)

6.6

0518

BERTEC0

BERT Error Counter 0 (lower word)

6.6

051C

BERTEC1

BERT Error Counter 1 (upper word)

6.6

4.8 Receive DMA Registers (7xx)

OFFSET/

ADDRESS

NAME

SECTION

0700

RFQBA0

Receive Free-Queue Base Address 0 (lower word)

9.2.3

0704

RFQBA1

Receive Free-Queue Base Address 1 (upper word)

9.2.3

0708

RFQEA

Receive Free-Queue End Address

9.2.3

070C

RFQSBSA

Receive Free-Queue Small Buffer Start Address

9.2.3

0710

RFQLBWP

Receive Free-Queue Large Buffer Host Write Pointer

9.2.3

0714

RFQSBWP

Receive Free-Queue Small Buffer Host Write Pointer

9.2.3

0718

RFQLBRP

Receive Free-Queue Large Buffer DMA Read Pointer

9.2.3

071C

RFQSBRP

Receive Free-Queue Small Buffer DMA Read Pointer

9.2.3

0730

RDQBA0

Receive Done-Queue Base Address 0 (lower word)

9.2.4

0734

RDQBA1

Receive Done-Queue Base Address 1 (upper word)

9.2.4

0738

RDQEA

Receive Done-Queue End Address

9.2.4

073C

RDQRP

Receive Done-Queue Host Read Pointer

9.2.4

0740

RDQWP

Receive Done-Queue DMA Write Pointer

9.2.4

0744

RDQFFT

Receive Done-Queue FIFO Flush Timer

9.2.4

0750

RDBA0

Receive Descriptor Base Address 0 (lower word)

9.2.2

0754

RDBA1

Receive Descriptor Base Address 1 (upper word)

9.2.2

0770

RDMACIS

Receive DMA Configuration Indirect Select

9.3.5

0774

RDMAC

Receive DMA Configuration

9.3.5

0780

RDMAQ

Receive DMA Queues Control

9.2.3/9.2.4

0790

RLBS

Receive Large Buffer Size

9.2.1

0794

RSBS

Receive Small Buffer Size

9.2.1

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