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参数资料
| 型号： | A82596SX |
| 厂商： | INTEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | HIGH-PERFORMANCE 32-BIT LOCAL AREA NETWORK COPROCESSOR |
| 中文描述： | 1 CHANNEL(S), 20M bps, LOCAL AREA NETWORK CONTROLLER, CPGA132 |
| 封装： | CERAMIC, PGA-132 |
| 文件页数： | 33/77页 |
| 文件大小： | 787K |
| 代理商： | A82596SX |
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82596DX/SX
Bits 20–22 RUC
D (3 bits) This field contains the command to the Receive Unit. Valid values are:
0
D NOP (does not alter current state of unit).
1
D Start reception of frames. The beginning of the RFA is contained in the RFA
OFFSET (address). If a frame is being received complete reception before
starting.
2
D Resume frame reception (only when in suspended state).
3
D Suspend frame reception. If a frame is being received complete its reception
before suspending.
4
D Abort receiver operation immediately.
5–7 D Reserved.
Bit 23 RESET
D Reset chip (logically the same as hardware RESET).
Status Word
15
0
STAT
0
CUS
0
RUS
0
0
0
0
SCB
82586 Mode
15
0
STAT
0
CUS
RUS
T
0
0
0
SCB
32-Bit Segmented and Linear Modes
Indicates the status of the 82596. This word is modified only by the 82596. Defined bits are:
Bit 15 CX
D The CU finished executing a command with its I (interrupt) bit set.
Bit 14 FR
D The RU finished receiving a frame.
Bit 13 CNA
D The Command Unit left the Active state.
Bit 12 RNR
D The Receive Unit left the Ready state.
Bits 8–10 CUS
D (3 bits) This field contains the status of the command unit. Valid values are:
0
D Idle
1
D Suspended
2
D Active
3–7 D Not used
Bits 4–7 RUS
D This field contains the status of the receive unit. Valid values are:
0h (0000) D Idle
1h (0001) D Suspended
2h (0010) D No resources. This bit indicates both no resources due to lack of RFDs
in the RDL and no resources due to lack of RBDs in the FBL.
4h (0100) D Ready
Ah (1010) D No resources due to no more RBDs. (Not in the 82586 mode.)
Ch (1100) D No more RBDs (not in the 82586 mode).
No other combinations are allowed.
Bit 3 T
D Bus Throttle timers loaded (not in 82586 mode).
SCB OFFSET ADDRESSES
CBL Offset (Address)
In 82586 and 32-bit Segmented modes this 16-bit quantity indicates the offset portion of the address for the
first Command Block on the CBL. In Linear mode it is a 32-bit linear address for the first Command Block on
the CBL. It is accessed only if CUC equals Start.
33
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