DM9102A Ver la hoja de datos (PDF) - Unspecified

Número de pieza

componentes Descripción

Lista de partido

DM9102A

Single Chip Fast Ethernet NIC controller

Unspecified 

DM9102A

Single Chip Fast Ethernet NIC controller

CardBus CIS Pointer (xxxxxx28 - CCIS)

This Card Information Structure (CIS), also known as tuples,

is a set of data structures saved in a nonvolatile memory on

the CardBus Card. The data stored in CIS describes the

product. Included in this data are the product

manufacturer’s name, product name, and most importantly,

the hardware description. The CIS is supported in the boot

ROM space or the memory space (serial ROM).

CIS is read upon card insertion into the socket. The

software entity that traditionally reads the CIS is usually

known as Card Services and Socket Services (CS & SS).

The CCIS pointer register is a read-only 32-bit register.

This register points to one of the possible address space

where the card information structure (CIS) begins. The

pointer is used in a CardBus environment. The content of

CCIS is loaded from the serial ROM after a hardware reset.

A value of 0 in this register indicates that CIS is not

supported.

31 28 27

ROM Image

Address Space Offset

Address Space Indicator

32

0

Bit

31:28

Default

Note

Type

R/W

Description

ROM Image

The 4-bit ROM image field value when the CIS reside in an expansion ROM.

27:3

Note

2:0

Note

R/W Address Space Offset

This field contains the address offset within the address space indicated by the

address space indicator field (CCIS<2:0>)

R/W Address Space Indicator

This field indicates the location of the CIS base address. The value of 2 indicates

that the CIS is stored in the serial ROM, and 7, indicates that the CIS is stored in the

expansion ROM.

note : read from serial ROM

20

Final

Version: DM9102A-DS-F03

August 28, 2000

Share Link: