MFC2000 datasheet(285/426 Pages) ETC

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Hardware Description

MFC 2000 Multifunctional Peripheral Controller 2000

100723A

Conexant

15-5

Address:

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Default:

SASFifoPtr

01FF80F7

Tx Input Pointer

Tx Output Pointer

Rst. Value

00h

Read Value

00h

Address:

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Default:

SASFifoPtr

01FF80F6

Rx Input Pointer

Rx Output Pointer

Rst. Value

00h

Read Value

00h

Bit 15-12: Transmit FIFO input pointer

(Read Only bit)

Bit 11-8:

Transmit FIFO output pointer

(Read Only bit)

Bit 7-4:

Receiver FIFO input pointer

(Read Only bit)

Bit 3-0:

Receiver FIFO output pointer

(Read Only bit)

Address:

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Default:

SASFifoQty

01FF80FD

(Not Used)

Tx FIFO Quantity

TxFIFOThreshVal

Rst. Value

X0000011b

Read Value

00000011b

Address:

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Default:

SASFifoQty

01FF80FC

(Not Used)

Rx FIFO Quantity

RxFIFOThreshVal

Rst. Value

X0000011b

Read Value

00000011h

Bit 15:

Not Used

Bit 14-10: TxFIFOQty (Transmit FIFO Quantity)

Read Only bits.

These five bits hold the value of the amount of bytes stored within the

transmit FIFO. As data is written to or removed from the TxFIFO, the

quantity will be adjusted accordingly.

Bit 9-8:

TxFIFOThreshVal (Transmit FIFO Threshhold value)

Read/Write bits.

Depending on how these two bits are set, will affect when the transmit

FIFO considers itself empty enough to cause an interrupt.

Bit Value

# of bytes left in TxFIFO which should cause

interrupt

“00”

“01”

“10”

“11”

Bit 7:

Not Used

MFC2000 Datasheet(PDF) 285 Page - List of Unclassifed Manufacturers

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