STE10 datasheet(8/66 Pages) STMICROELECTRONICS

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STE10/100

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5.0 REGISTERS AND DESCRIPTORS DESCRIPTION

There are three kinds of registers within the STE10/100: STE10/100 configuration registers, PCI control/status

registers, and Transceiver control/status registers.

The STE10/100 configuration registers are used to initialize and configure the STE10/100 and for identifying

and querying the STE10/100.

The PCI control/status registers are used to communicate between the host and STE10/100. The host can ini-

tialize, control, and read the status of the STE10/100 through mapped I/O or memory address space.

The STE10/100 contains 11 16-bit registers to supported Transceiver control and status. They include 7 basic

registers which are defined according to clause 22 “Reconciliation Sub-layer and Media Independent Interface”

and clause 28 “Physical Layer link signaling for 10 Mb/s and 100 Mb/s Auto-Negotiation on twisted pair” of the

IEEE802.3u standard. In addition, 4 special registers are provided for advanced chip control and status.

The STE10/100 also provides receive and transmit descriptors for packet buffering and management.

5.1 STE10/100 Configuration Registers

An STE10/100 software driver can initialize and configure the chip by writing its configuration registers. The

contents of configuration registers are set to their default values upon power-up or whenever a hardware reset

occurs, but their settings remain unchanged whenever a software reset occurs. The configuration registers are

byte, word, and double word accessible.

Table 2. STE10/100 configuration registers list

Offset

Index

Name

Descriptions

00h

CR0

LID

Loaded device ID and vendor ID

04h

CR1

CSC

Configuration Status and Command

08h

CR2

Class Code and revision number

0ch

CR3

Latency Timer

10h

CR4

IOBA

IO Base Address

14h

CR5

MBA

Memory Base Address

2ch

CR11

SID

Subsystem ID and vendor ID

30h

CR12

BRBA

Boot ROM Base Address (ROM size = 128KB)

34h

CR13

Capability Pointer

3ch

CR15

CINT

Configuration Interrupt

40h

CR16

driver space for special purpose

80h

CR32

SIG

Signature of STE10/100

c0h

CR48

PMR0

Power Management Register 0

c4h

CR49

PMR1

Power Management Register 1

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