PCI Configuration Registers

Should autoconfiguration fail (bad checksum), this register is loaded with the ThunderLAN device ID of 0500h.

A.1.4 PCI Command Register (@ 04h)

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

 

 

 

Reserved

 

 

 

SER

Res

Par

 

Reserved

 

BM

Mem

I/O

 

 

 

 

 

 

En

En

 

 

En

En

En

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table A±1. PCI Command Register Bits

Bit

Name

Function

15±9

Reserved

Writes to these bits are ignored; bits are always read as 0.

8

SER_En

PSERR# driver enable: A value of 1 enables the adapter PSERR# driver. A value of

 

 

0 disables the driver.

7

Reserved

Writes to this bit are ignored; bit is always read as 0.

6

PAR_En

Parity enable: Enables the adapter PCI parity checking. A value of 1 allows the adapter

 

 

to check PCI parity, a value of 0 causes PCI parity errors to be ignored.

5±3

Reserved

Writes to these bits are ignored; bits are always read as 0.

2

BM_En

Bus master enable: Enables the adapter as a PCI bus master. A value of 1 enables bus

 

 

master operations, a value of 0 disables them.

1

Mem_En

Memory enable: Enables memory-mapped accesses to the adapter. A value of 0 dis-

 

 

ables response to memory-mapped accesses. A value of 1 enables response to

 

 

memory-mapped accesses.

0

I/O_En

I/O Enable: Enables I/O mapped accesses to the adapter. A value of 0 disables re-

 

 

sponse to I/O accesses. A value of 1 enables response to I/O accesses.

 

 

 

Register Definitions

A-5

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Texas Instruments TNETE110A, TNETE211, TNETE100A manual PCI Command Register @ 04h, Table A±1. PCI Command Register Bits, Ser

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