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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)： | 22/40頁 |
| 文件大?。?/td> | 347K |
| 代理商： | AM79C981 |
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AMD
PRELIMINARY
1–92
Am79C981
Loopback Test Mode
The IMR+ chip can be programmed to enter Loopback
Mode on all network ports. This is accomplished by first
driving the TEST pin HIGH, then clocking (using the
SCLK pin) a minimum of three 0s into the SI pin. This
causes the IMR+ chip to loop all received data on each
port back to each port’s corresponding transmit outputs.
Specifically, the AUI DI input is passed unaltered to the
AUI DO output, and each RXD input on the twisted pair
ports is passed (unaltered) to the respective TXD and
TXP outputs. Only receive data that passes the required
amplitude squelch criteria is looped back to the transmit
outputs. Note that the data is looped back unaltered,
meaning that no signal retiming or regeneration takes
place. Therefore, any signal distortion present on the re-
ceive data paths will be retransmitted.
In Minimum Mode, the Loopback Test Mode cannot be
accessed. The IMR+ device will return to normal opera-
tion when the TEST pin is again driven LOW.
TEST
SI
SCLK
17306B-11
Figure 6. Programming the IMR+ Device for Loopback Mode
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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