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參數(shù)資料
| 型號： | AM79C981 |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | Integrated Multiport Repeater Plus⑩ (IMR+⑩) |
| 中文描述： | 綜合多端中繼器加⑩（死亡率⑩） |
| 文件頁數(shù)： | 20/40頁 |
| 文件大?。?/td> | 347K |
| 代理商： | AM79C981 |
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AMD
PRELIMINARY
1–90
Am79C981
Am79C981
IMR+ Chip
XTAL
OSC
CK
D
Q
ASYNC
RESET
X1
X2
RST
STR
SO
CLR
CK
Q
Q
D
1/2 ’74
TCK
CK
SI
SIPO
CK
T
P
7
T
P
6
T
P
5
T
P
0
17306B-7
A
U
I
1/2 ’74
TCK
SCLK
SI
Register
TEST
Figure 3. Minimum Mode, Non-Intelligent Repeater Example
X1
CRS
(Note 2)
STR
CRS
AUI
CRS
TP0
CRS
TP1
CRS
TP2
CRS
TP3
CRS
TP4
CRS
TP5
CRS
TP6
CRS
TP7
CRS
AUI
TCK
(Note 1)
SO
(Note 3)
SO
AUI
SO
TP0
SO
TP1
SO
TP2
SO
TP3
SO
TP4
SO
TP5
SO
TP6
SO
TP7
SO
AUI
17306B-8
Notes:
1. Externally generated signal illustrates internal IMR+ chip clock phase relationship.
2. CRS timing with the C-bit cleared (IMR+ Chip Programmable Options)
3. For Minimum Hub Mode
Figure 4. Management Port Minimum Mode and
Port Activity Monitor Signal Relationship
Port Activity Monitor
Two pins, CRS and STR, are used to serially output the
state of the internal Carrier Sense signals from the AUI
and the eight TP ports. This function together with exter-
nal hardware and/or software can be used to monitor re-
peater receive and/or collision activity.
The following diagram shows typical external hardware
employed to convert the serial bit stream into parallel
form. The accuracy of the CRS signals is 10 Bit Times
(BT) (1
μ
s). Specifically, a transition to active state by
any of the internal carrier sense bits that lasts for less
than 10BT is latched internally and is used to set the ap-
propriate bit during the next sample period.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AM79C981JC | Integrated Multiport Repeater Plus⑩ (IMR+⑩) |
| AM79C982 | basic Integrated Multiport Repeater (bIMR) |
| AM79C982-4JC | basic Integrated Multiport Repeater (bIMR) |
| AM79C982-8JC | basic Integrated Multiport Repeater (bIMR) |
| AM79C983AKC | Integrated Multiport Repeater 2 (IMR2⑩) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM79C981JC | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Integrated Multiport Repeater Plus⑩ (IMR+⑩) |
| AM79C982 | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:basic Integrated Multiport Repeater (bIMR) |
| AM79C982-4JC | 制造商:Advanced Micro Devices 功能描述:LAN HUB CONTROLLER, 84 Pin, PLCC |
| AM79C982-8JC | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:basic Integrated Multiport Repeater (bIMR) |
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