AN983B Datasheet, PDF (25/91 Pages) List of Unclassifed Manufacturers – PCI/miniPCI-to-Ethernet LAN Controller

AN983B PCI/miPCI Fast Ethernet Controller with integrated PHY
R/W
0
BRE
Boot ROM Enable. The AN983B really enables its boot ROM 0
R/W
access only if both the memory space access bit (bit 1 of
CR1) and this bit are set to 1.
1: enable Boot ROM. (Combines with bit 1 of CR1)
This register should be initialized before accessing the boot ROM space. (Write 32’hffffffff return 32’h
fffe0001)
CR13 (offset = 34h), CP - Capabilities Pointer.
Bit # Name Descriptions
31~8 ---
Reserved
7~0 CP
Capabilities Pointer.
Default Val RW Type
C0h
RO
CR15 (offset = 3ch), CI - Configuration Interrupt
Bit # Name Descriptions
Default Val RW Type
31~24 ML
Max_Lat register. This value indicates “how often” the
From
RO
AN983B needs to access to the PCI bus in the units of 250ns. EEPROM
This value is loaded from serial EEPROM after power on or
hardware reset.
23~16 MG
Min_Gnt register. This value indicates how long the AN983B From
RO
needs to retain the PCI bus ownership whenever it initiates a EEPROM
transaction, in the units of 250ns. This value is loaded from
serial EEPROM after power on or hardware reset.
15~ 8 IP
Interrupt Pin. This value indicates which of the four interrupt 01h
RO
request pins that AN983B is connected.
Always 01h: means the AN983B connects to INTA#
7 ~ 0 IL
Interrupt Line. This value indicates which of the system
X
R/W
interrupt request lines the INTA# of AN983B is routed to. The
BIOS will fill this field when it initializes and configures the
system. The AN983B driver can use this value to determine
priority and vector information.
CR16 (offset = 40h), DS - Driver Space for special purpose.
Bit # Name Descriptions
Default Val RW Type
31~16 ---
Reserved
15~8 DS
Driver Space for special purpose. Since this area won’t be X
R/W
cleared in the software reset. The AN983B driver can use this
R/W area for special purpose.
7 ~ 0 ---
Reserved
(offset = 80h), SIG - Signature of AN983B
Bit # Name Descriptions
31~16 DID Device ID, the device ID number of AN983B.
15~0
VID Vendor ID, the vendor ID number of ADM Technology Corp.
Default Val RW Type
0981h
RO
1317h
RO
Rev. 1.8
ADMtek Inc.
www.admtek.com.tw