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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： | 52/77页 |
| 文件大小： | 787K |
| 代理商： | A82596SX |
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82596DX/SX
DIAGNOSE
The Diagnose Command triggers an internal self-test procedure that checks internal 82596 hardware, which
includes:
#
Exponential Backoff Random Number Generator (Linear Feedback Shift Register).
#
Exponential Backoff Timeout Counter.
#
Slot Time Period Counter.
#
Collision Number Counter.
#
Exponential Backoff Shift Register.
#
Exponential Backoff Mask Logic.
#
Timer Trigger Logic.
This procedure checks the operation of the Backoff block, which resides in the serial side and is not easily
controlled. The Diagnose command is performed in two phases.
The format of the 82596 Diagnose command is:
82586 and 32-Bit Segmented Modes
16
31
ODD WORD
15
0
EVEN WORD
EL S
I
X
X
X
X
X
X
X
X
X
X
1
1
1
C
B OK 0
F
0
0
0
0
0
0
0
0
0
0
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X A15
A0
LINK OFFSET
Linear Mode
16
31
ODD WORD
15
0
EVEN WORD
EL S
I
0
0
0
0
0
0
0
0
0
0
1
1
1
C
B OK 0
F
0
0
0
0
0
0
0
0
0
0
0
A31
A0
LINK ADDRESS
Figure 36. Diagnose
where:
LINK ADDRESS,
EL, B, C, I, S
D As per standard Command Block (see the NOP command for details).
Bits 19–28
D Reserved (0 in the 32-bit Segmented and Linear Modes).
CMD (bits 16–18)
D The Diagnose command. Value: 7h.
OK (bit 13)
D Indicates error free completion.
F (bit 11)
D Indicates that the self-test procedure has failed.
RECEIVE FRAME DESCRIPTOR
Each received frame is described by one Receive Frame Descriptor (see Figure 37). Two new memory
structures are available for the received frames. The structures are available only in the Linear and 32-bit
Segmented modes.
52
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