STE100 datasheet(12/66 Pages) STMICROELECTRONICS

12 / 66 page

STE10/100

12/66

IOSI

Memory Space Indicator.

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

0RO

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

31~16

SID

Subsystem ID. This value is loaded from EEPROM as a result

of power-on or hardware reset.

From

EEPROM

15~ 0

SVID

Subsystem Vendor ID. This value is loaded from EEPROM as

a result power-on or hardware reset.

From

EEPROM

CR12(offset = 30h), BRBA - Boot ROM Base Address. This register should be initialized before accessing the

boot ROM space.

31~10

BRBA

Boot ROM Base Address. This value indicates the address

mapping of the boot ROM field as well as defining the boot

ROM size. The values of bit 16~10 are set to 0 indicating that

the STE10/100 supports up to 128kB of boot ROM.

X: b31~17

0: b16~10

R/W

9 ~ 1

---

reserved

RO R/W R/

BRE

Boot ROM Enable. The STE10/100 will only enable its boot

ROM access if both the memory space access bit (bit 1 of

CR1) and this bit are set to 1.

1: enable Boot ROM. (if bit 1 of CR1 is also set)

R/W

CR13(offset = 34h), CP - Capabilities Pointer.

31~8

---

reserved

7~0

Capabilities Pointer.

C0H

CR15(offset = 3ch), CI - Configuration Interrupt

31~24

Max_Lat register. This value indicates how often the STE10/

100 needs to access to the PCI bus in units of 250ns. This

value is loaded from serial EEPROM as a result of power-on or

hardware reset.

From

EEPROM

23~16

Min_Gnt register. This value indicates how long the STE10/

100 needs to retain the PCI bus ownership whenever it

initiates a transaction, in units of 250ns. This value is loaded

from serial EEPROM as a result power-on or hardware reset.

From

EEPROM

15~ 8

Interrupt Pin. This value indicates one of four interrupt request

pins to which the STE10/100 is connected.

01h: means the STE10/100 always connects to INTA#

01h

7 ~ 0

Interrupt Line. This value indicates the system interrupt

request lines to which the INTA# of STE10/100 is routed. The

BIOS will fill this field when it initializes and configures the

system. The STE10/100 driver can use this value to determine

priority and vector information.

R/W

CR16(offset = 40h), DS - Driver Space for special purpose.

31~16

---

reserved

Table 4. Configuration Registers Descriptions

Bit #

Name

Descriptions

Default Val

RW Type

STE100 数据表(PDF) 12 Page - STMicroelectronics

STE100 数据表(HTML) 12 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66

数据表下载

链接网址

STE100 数据表(PDF) 12 Page - STMicroelectronics

STE100 数据表(HTML) 12 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66

数据表 下载

链接网址

数据表下载