AN983 datasheet(43/91 Pages) ETC

43 / 91 page

AN983B

PCI/miPCI Fast Ethernet Controller with integrated PHY

effect.

Since the AN983B doesn’t supports PME# from D3cold, this

bit is defaulted to “0”.

14,13

DSCAL

Data_Scale, indicates the scaling factor to be used when

interpreting the value of the Data register. This field is

required for any function that implements the Data register.

Otherwise, it’s optional.

The AN983B doesn’t support Data register and Data_Scale.

00b

12~9

DSEL

Data_Select, This four bit field is used to select which data is

to be reported through the Data register and Data_Scale

field. This field is required for any function that implements

the Data register.

The AN983B doesn’t support Data_select.

0000b

PME_En

PME_En, “1” enables the AN983B to assert PME#. When “0”

disables the PME# assertion.

This bit defaults to “0” if the function does not support PME#

generation from D3cold.

7~2

---

Reserved.

000000b

1,0

PWRS

PowerState, This two bit field is used both to determine the

current power state of the AN983B and to set the AN983B

into a new power state. The definition of this field is given

below.

00b - D0

01b - D1

10b - D2

11b - D3hot

If software attempts to write an unsupported, optional state

to this field, the write operation must complete normally on

the bus, however the data is discarded a no state change

occurs.

00b

CSR21 (offset = 94h) - WTDP, The current working transmit descriptor pointer

Bit #

Name

Descriptions

Default Val RW Type

31~0

WTDP

The current working transmit descriptor pointer for driver’s

double-checking or other special purpose.

XXXX

CSR22 (offset = 98h) - WRDP, The current working receive descriptor pointer

Bit #

Name

Descriptions

Default Val RW Type

31~0

WRDP

The current working receive descriptor pointer for driver’s

double-checking or other special purpose.

XXXX

CSR23 (offset = 9ch) - TXBR, transmit burst count / time-out

Bit #

Name

Descriptions

Default Val RW Type

31~21

---

Reserved

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