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DP83820BVUW-AB View Datasheet(PDF) - National ->Texas Instruments

Part NameDescriptionManufacturer
DP83820BVUW-AB 10/100/1000 Mb/s PCI Ethernet Network Interface Controller National-Semiconductor
National ->Texas Instruments National-Semiconductor
DP83820BVUW-AB Datasheet PDF : 87 Pages
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4.0 Register Set
4.1 Configuration Registers
The DP83820 implements a PCI version 2.2 configuration register space. This allows a PCI BIOS to "soft" configure the
DP83820. Software Reset has no effect on configuration registers. Hardware Reset returns all configuration registers to
their hardware reset state. For all unused registers, writes are ignored, and reads return 0.
Table 4-1 Configuration Register Map
offset
00h
04h
08h
0Ch
10h
14h
18
1Ch-28h
2Ch
30h
34h
38h
3Ch
40h
44h
48-FFh
tag
description
CFGID Configuration Identification Register
CFGCS Configuration Command and Status Register
CFGRID Configuration Revision ID Register
CFGLAT Configuration Latency Timer Register
CFGIOA Configuration IO Base Address Register
CFGMA Configuration Memory Address Register
CFGMA1 Configuration Memory Address High Dword Register
Reserved (reads return zero)
CFGSID Configuration Subsystem Identification Register
CFGROM Boot ROM configuration register
CAPPTR Capabilities Pointer Register
Reserved (reads return zero)
CFGINT Configuration Interrupt Select Register
PMCAP Power Management Capabilities Register
PMCS Power Management Control and Status Register
Reserved (reads return zero)
access
RO
R/W
RO
RO
R/W
R/W
R/W
RO
R/W
RO
R/W
RO
R/W
4.1.1 Configuration Identification Register
This register identifies the DP83820 Controller to PCI system software.
Tag: CFGID
Size: 32 bits
Offset: 00h
Access: Read Only
Hard Reset: 0022100B
Soft Reset: Unchanged
bit
31-16
15-0
tag
DEVID
description
Device ID
VENID Vendor ID
usage
This field is read-only and is set to the device ID assigned by NSC to the
DP83820, which is 0022h.
This field is read-only and is set to a value of 100Bh which is National
Semiconductor's PCI Vendor ID.
32
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