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參數(shù)資料
| 型號： | 82596SX |
| 廠商： | Intel Corp. |
| 英文描述： | HIGH-PERFORMANCE 32-BIT LOCAL AREA NETWORK COPROCESSOR |
| 中文描述： | 高性能的32位局域網(wǎng)協(xié)處理器 |
| 文件頁數(shù)： | 32/77頁 |
| 文件大?。?/td> | 787K |
| 代理商： | 82596SX |
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82596DX/SX
31
16
ODD WORD
15
0
EVEN WORD
ACK
0
CUC
R
RUC
0
0
0
0
STAT
0
CUS
RUS
T
0
0
0 SCB
COMMAND BLOCK ADDRESS
SCB
a
4
RECEIVE FRAME AREA ADDRESS
SCB
a
8
CRC ERRORS
SCB
a
12
ALIGNMENT ERRORS
SCB
a
16
RESOURCE ERRORS (
*
)
OVERRUN ERRORS (
*
)
RCVCDT ERRORS (
*
)
SCB
a
20
SCB
a
24
SCB
a
28
SHORT FRAME ERRORS
SCB
a
32
T-ON TIMER
T-OFF TIMER
SCB
a
36
*
In MONITOR mode these counters change function
Figure 20. SCBDLinear Mode
Command Word
31
16
ACK
0
CUC
R
RUC
0
0
0
0
SCB
a
2
These bits specifiy the action to be performed as a result of a CA. This word is set by the CPU and cleared by
the 82596. Defined bits are:
Bit 31 ACK-CX
D Acknowledges that the CU completed an Action Command.
Bit 30 ACK-FR
D Acknowledges that the RU received a frame.
Bit 29 ACK-CNA
D Acknowledges that the Command Unit became not active.
Bit 28 ACK-RNR
D Acknowledges that the Receive Unit became not ready.
Bits 24–26 CUC
D (3 bits) This field contains the command to the Command Unit. Valid values are:
0
D NOP (does not affect current state of the unit).
1
D Start execution of the first command on the CBL. If a command is executing,
complete it before starting the new CBL. The beginning of the CBL is in CBL
OFFSET (address).
2
D Resume the operation of the Command Unit by executing the next command.
This operation assumes that the Command Unit has been previously sus-
pended.
3
D Suspend execution of commands on CBL after current command is complete.
4
D Abort current command immediately.
5
D Loads the Bus Throttle timers so they will be initialized with their new values
after the active timer (T-ON or T-OFF) reaches Terminal Count. If no timer is
active new values will be loaded immediately. This command is not valid in
82586 mode.
6
D Loads and immediately restarts the Bus Throttle timers with their new values.
This command is not valid in 82586 mode.
7
D Reserved.
32
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 82596CA | HIGH-PERFORMANCE 32-BIT LOCAL AREA NETWORK COPROCESSOR |
| 8261SHAKE22 | Alternate Action and Momentary Pushbutton Switches |
| 8261SHAKE223 | Alternate Action and Momentary Pushbutton Switches |
| 8261SHAPE22 | Alternate Action and Momentary Pushbutton Switches |
| 8261SHAPE223 | Alternate Action and Momentary Pushbutton Switches |
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