AN983 datasheet(24/91 Pages) ETC

24 / 91 page

AN983B

PCI/miPCI Fast Ethernet Controller with integrated PHY

timer expires and the AN983B still asserted FRAME#, then the

AN983B will terminate the data transaction as soon as its

GNT# is removed.

7 ~ 0

CLS

Cache Line Size. This value specifies the system cache line

size in units of 32-bit double words (DW). The AN983B

supports 8, 16, and 32 DW of cache line size. This value is

used by the AN983B driver to program the cache alignment

bits (bit 14 and 15 of CSR0). The cache alignment bits are

used for cache oriented PCI commands; say

memory-read-line, memory-read-multiple, and

memory-write-and-invalidate.

R/W

CR4 (offset = 10h), IOBA - I/O Base Address

Bit #

Name

Descriptions

Default Val RW Type

31~ 8

IOBA

I/O Base Address. This value indicate the base address of PCI

control and status register (CSR0~28)

R/W

7 ~ 1

---

Reserved.

IOSI

I/O Space Indicator.

1: means that the configuration registers map into the I/O

space.

CR5 (offset = 14h), MBA - Memory Base Address

Bit #

Name

Descriptions

Default Val RW Type

31~ 10

MBA

Memory Base Address. This value indicate the base address

of PCI control and status register (CSR0~28)

R/W

9 ~ 1

---

Reserved.

IOSI

Memory Space Indicator.

1: means that the configuration registers map into the I/O

space.

CR11 (offset = 2ch), SID - Subsystem ID.

Bit #

Name

Descriptions

Default Val RW Type

31~16

SID

Subsystem ID. This value is loaded from EEPROM after power

on or hardware reset.

From

EEPROM

15~ 0

SVID

Subsystem Vendor ID. This value is loaded from EEPROM after

power on or hardware reset.

From

EEPROM

CR12 (offset = 30h), BRBA - Boot ROM Base Address.

Bit #

Name

Descriptions

Default Val RW Type

31~17

BRBA

Boot ROM Base Address. This value indicates the address

mapping of boot ROM field. Besides, it also defines the boot

ROM size. The value of bit 17~10 is set to 0 for AN983B

supports up to 256KB of boot ROM.

X: b31~18

0: b17~10

R/W

16 ~ 1

---

Reserved

RO R/W

ADMtek Inc.

www.admtek.com.tw

Rev. 1.8

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