MFC2000 datasheet(407/426 Pages) ETC

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Hardware Description

MFC 2000 Multifunctional Peripheral Controller 2000

100723A

Conexant

24-21

Address:

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Default:

ARM Bus C2A

Throttle

(Abc2aThrottle)

$01FF82A7

(Not Used)

ARM Bus

Output

Throttle[10]

ARM Bus

Output

Throttle[9]

ARM Bus

Output

Throttle[8]

Rst. Value

xxxxx000b

Read Value

00h

Address:

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Default:

ARM Bus C2A

Throttle

(Abc2aThrottle)

$01FF82A6

ARM Bus

Output

Throttle[7]

ARM Bus

Output

Throttle[6]

ARM Bus

Output

Throttle[5]

ARM Bus

Output

Throttle[4]

ARM Bus

Output

Throttle[3]

ARM Bus

Output

Throttle[2]

ARM Bus

Output

Throttle[1]

ARM Bus

Output

Throttle[0]

Rst Value

00h

Read Value

00h

Bit 15-11

Not used

Bit 10-0

ARM Bus Interface Output (C2A) DMA Throttle value

A value of zero indicates no throttle. A value of 3FFh indicates 2047

Countach Bus Subsystem clocks (25 MHz) between successive DMA

acknowledges.

24.5.3 Firmware Operation

CDMA Channel 0 Setup and Operation

Program the DMA Controller

•

Select Mode

•

For Video Mode set up Address Register 2

•

Write Jump Value

•

Write Address Register 1. This will also initialize the channel by setting up the Address Holder and

Address Counter.

Operation

•

At the end of each line of data the vsi_eol will pulse, causing the holder value to be added to the jump

value and placed back into the Address Holder.

•

For Video Mode, multiple vsi_eols will occur, then a vsi_eof. Upon the 1

st vsi_eof, the Address Register2

will be loaded into the holder and counter.

•

Additional vsi_eols will occur and then a 2

nd vsi_eof. Upon the 2st vsi_eof the IRQ will be asserted.

MFC2000 Datasheet(PDF) 407 Page - List of Unclassifed Manufacturers

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