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參數(shù)資料
| 型號： | AM79C987 |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | Hardware Implemented Management Information Base (HIMIB) Device |
| 中文描述： | 硬件實現(xiàn)管理信息庫（HIMIB）設(shè)備 |
| 文件頁數(shù)： | 9/30頁 |
| 文件大小： | 183K |
| 代理商： | AM79C987 |
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AMD
P R E L I M I N A R Y
9
Am79C987
Port (P) Register
Register (R) Register
Command (C) Port
Data (D) Port
C/
D
= 1
Bank 0
Bank 1
Register
Register
0
31
0
31
0
31
Register
Bank 31
Port (or Bank)
Pointer
Register (or Attribute)
Pointer
000XXXXX
111XXXXX
C/
D
= 0
17305B-4
.
.
.
.
Figure 1. Overview of HIMIB Register Definition
An exception to the normal Command/Data Port access
scheme, is the Status Register which is read directly by
reading only the C Port. This allows the Status Register
to be read directly, without the need to write to the
CPort.
Register Definition
In the following description, all bit fields are ordered
such that the left most bit is the most significant bit. Un-
used Port and Register Numbers are reserved and
should not be accessed as this may cause device mal-
function.
When specifying the Port or Bank Number, the following
command byte is written to the C Port:
C Port Write
MSB
LSB
0
0
0
P4
P3
P2
P1
P0
P[4:0] represent the Register Bank or Port Number.
These are organized as follows:
P = [P4P3P2P1P0]
Note that to access the P register the three most signifi-
cant bits of this byte must be zero.
P [4:0]
0
1
2
16 – 23
31
Port/Register Bank
Repeater Registers
Port Status Registers
Port Control Registers
Twisted Pair Ports Attributes
AUI Port Attributes
When specifying the Register or Attribute to be ac-
cessed, the following command byte is written to the
CPort.
C Port Write
MSB
LSB
1
1
1
R4
R3
R2
R1
R0
R = [R4R3R2R1R0]
Note that to access the R register the three most signifi-
cant bits of this byte must be one.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM79C987JC | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Hardware Implemented Management Information Base (HIMIB) Device |
| AM79C987JCB | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Hardware Implemented Management Information Base (HIMIB) Device |
| AM79C988 | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Quad Integrated Ethernet Transceiver (QuIET⑩) |
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