Adapter Host Registers

 

Table A±5. Host_CMD Register Bits (Continued)

 

 

 

 

 

Bit

Name

Function

 

 

 

 

 

20

EOC

End of channel select: This read/write bit is used to select between the EOC, EOF, and

 

 

 

command bit operations. If this bit is set to a 1, then end of channel operations are se-

 

 

 

lected. If set to a 0, EOF operations are selected.

 

 

 

This bit is also used to select between status and statistics commands when the Nes

 

 

 

bit is set to a 0. When Nes is set to 0 and this bit is set to 1, status commands are se-

 

 

 

lected; otherwise statistics commands are selected.

 

 

 

This field is written in the same cycle as the command bits, and allows a command to

 

 

 

be issued in a single write cycle.

 

19

R/T

Rx/Tx select: This read/write bit is used to select between receive and transmit com-

 

 

 

mand bit operations. If this bit is set to a 1, then receive command operations are se-

 

 

 

lected. if set to a 0, then transmit operations are selected.

 

 

 

This field is written to in the same cycle as the command bits, and allows a command

 

 

 

to be issued in a single write cycle.

 

18

Nes

Not error/statistics: This read/write bit is used to select between status (error)/statistics

 

 

 

operations and channel operations. If this bit is set to a 0, then status/statistics opera-

 

 

 

tions are selected. If set to a 1, channel operations are selected. This field can be written

 

 

 

in the same cycle as the command bits, and allows a command to be issued in a single

 

 

 

write cycle.

 

17

0

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

 

16

0

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

 

15

Ad_Rst

Adapter reset: Writing a 1 to this bit position causes the adapter to be reset. All channels

 

are cleared and initialized, the ThunderLAN controller is reset, and any network opera- tions are terminated. The receiver and transmitter are placed in their stopped states. The ThunderLAN controller's own (sticky) reset bit is also set.

This bit is always read as a 0. There is no need to clear this bit.

If this bit is written as a 1 and and the Ints_on and Ints_off bits are also set to 1s, then autoconfiguration of the configuration space registers from the configuration EEPROM takes place.

Register Definitions

A-15

Page 128
Image 128
Texas Instruments TNETE100A manual Lected. If set to a 0, EOF operations are selected, Be issued in a single write cycle

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