MFC2000 datasheet(121/426 Pages) ETC

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Hardware Description

MFC 2000 Multifunctional Peripheral Controller 2000

100723A

Conexant

4-91

Address: chcsbh[2] Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Default:

DMA Ch2 Buffered

Hi Counter

(DMA2Cntbhi)

$xx818F

Not Used

Rst. Value

00h

Read

Value 00h

Address:chcsbh[2] Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Default:

DMA Ch2 Buffered

Hi Counter

(DMA2Cntbhi)

$xx818E

DMAB2

Addr.

Bit 23

DMAB2

Addr.

Bit 22

DMAB2

Addr.

Bit 21

DMAB2

Addr.

Bit 20

DMAB2

Addr.

Bit 19

DMAB2

Addr.

Bit 18

DMAB2

Addr.

Bit 17

DMAB2

Addr.

Bit 16

Rst. Value

00h

Read

Value 00h

•

DMA Channel 2 Upper Buffered Address Counter Value

•

The Buffered Address Counter Value will be down loaded into the Address Counter when the current Block

Size is reached and a new value has been written into the Buffered Block Size register.

Address:ch5csbs

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Default:

DMA5 Transfer

Block Size Reg.

(DMA4BlockSize)

$xx81BB

Channel 5

Enable = 1

Not Used

Upper six bits of the Block Size counter

Rst. Value

00h

Read

Value 00h

Address:ch5csbs

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Default:

DMA5Transfer

Block Size Reg.

(DMA4BlockSize)

$xx81BA

Low Byte Value for the PIO to Memory Block Size Counter

Rst. Value

00h

Read

Value 00h

•

DMA Channel 5 Block Size Limit Counter

•

block size of DMA channel 5 (bytes)

− Unlimited block size (block size =

∞ ):

bit[13:0] of the DMA5BlockSize register = 0000h

Limited block size (block size = 1 - 16380)

•

The Block Size counter will increment regardless of the DMA Address counter’s activity

Bit 15:

Channel 5 Enable is cleared when the block size limit is reached, and

must be set, (enabled) after a new block size is entered. This bit is

also inverted and sent to the PIO as MaxDmaCnt. The new block size

can only be written when this bit is 0.

MFC2000 Datasheet(PDF) 121 Page - List of Unclassifed Manufacturers

MFC2000 Datasheet(HTML) 121 Page - List of Unclassifed Manufacturers

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