STE100A ST Microelectronics, Inc., STE100A Datasheet - Page 35

• Manufacturer Part Number: STE100A
• Description: PCI 10/100 Ethernet Controller with Integrated PHY (3.3v)
• Manufacturer: ST Microelectronics, Inc.

STE10/100A
Table 6.
CR13 (offset = 34h), CP - Capabilities pointer
CR15 (offset = 3ch), CI - Configuration interrupt
CR16 (offset = 40h), DS - Driver space for special purpose
CR32 (offset = 80h), SIG - Signature of STE10/100A
31~10
31~24
23~16
31~16
15~ 8
9 ~ 1
31~8
7 ~ 0
15~8
7 ~ 0
Bit #
7~0
0
Configuration registers description (continued)
Name
BRBA
BRE
MG
CP
ML
DS
---
---
---
---
IP
IL
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 STE10/100A supports
up to 128Kbit of boot ROM.
Reserved
Boot ROM enable. The STE10/100A 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).
Reserved
Capabilities pointer
Max_Lat register. This value indicates how often the
STE10/100A 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.
Min_Gnt register. This value indicates how long the
STE10/100A 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.
Interrupt Pin. This value indicates one of four
interrupt request pins to which the STE10/100A is
connected.
01h: means the STE10/100A always connects to
INTA#.
Interrupt Line. This value indicates the system
interrupt request lines to which the INTA# of
STE10/100A is routed. The BIOS will fill this field
when it initializes and configures the system. The
STE10/100A driver can use this value to determine
priority and vector information.
Reserved
Driver space for implementation-specific purpose.
Since this area won’t be cleared upon software
reset, an STE10/100A driver can use this R/W area
as user-specified storage.
Reserved
Description
Registers and descriptors description
X: b31~17
0: b16~10
EEPROM
EEPROM
Default
From
From
C0h
01h
0
0
0
RW type
RO R/W
R/W
R/W
R/W
R/W
R/W
RO
RO
RO
RO
RO
35/82