參數(shù)資料
型號(hào)： AM79C985
廠商： Advanced Micro Devices, Inc.
英文描述： enhanced Integrated Multiport Repeater Plus (eIMR+⑩)
中文描述： 強(qiáng)化的綜合多端中繼器加（eIMR⑩）
文件頁(yè)數(shù)： 32/48頁(yè)
文件大小： 260K
代理商： AM79C985
32
Am79C985
P R E L I M I N A R Y
Figure 11.
RXD Termination
MAC Interface
The eIMR+ device can be connected directly to a MAC
through the AUI port. This requires that the AUI port be
configured in the reverse mode and connected as
shown in Figure 12a. Notice that DI is connected to DO
of the MAC and DO is connected to DI of the MAC, be-
cause the reverse configuration only affects CI. Where
CI is an input in the normal mode, in the reverse mode,
CI is an output. Figure 12b shows the normal AUI con-
figuration for reference.
Figure 12.
AUI Port Interconnections
Internal Arbitration Mode Connection
The internal arbitration mode uses a modified daisy-
chain scheme to eliminate the need for any external
arbiter. In this mode, ACK and COL need to be pulled
up through a minimum resistance of 1 k
JAM pins also need to be pulled down via a high value
resistor. Refer to Figure 13.
.
The DAT and
IMR+ Mode External Arbitration
The IMR+ mode maintains the full functionality of AMD’s
IMR+ (Am79C981) device’s expansion bus. In this
mode, the eIMR+ device requires external circuitry to
handle arbitration for control of the bus. Figure 14 shows
the configuration for the IMR+ mode of operation.
20650A-14
1:1
Twisted Pair
100
100
RXD+
RXD–
20651B-16
DO+
DO–
DI+
DI–
CI+
CI–
DI+
DI–
DO+
DO–
CI+
CI–
DI+
DI–
DO+
DO–
CI+
CI–
DI+
DI–
DO+
DO–
CI+
CI–
a) Reverse Mode (with MAC)
b) Normal Mode (with MAU)
Am79C940
eIMR+
Am7996
eIMR+
0.1
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
39 – 150
0.1
μ
F
40
40
40
40
40
40
40
40
40
40
40
40
–9 V
1:1
1:1
1:1
20651A-17
20651B-17
相關(guān)PDF資料
PDF描述
AM79C985KCW enhanced Integrated Multiport Repeater Plus (eIMR+⑩)
AM79C987 Hardware Implemented Management Information Base (HIMIB) Device
AM79C987JC Hardware Implemented Management Information Base (HIMIB) Device
AM79C987JCB Hardware Implemented Management Information Base (HIMIB) Device
AM79C988A IC,Motor Controller,CMOS,SOP,8PIN
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C985JC 制造商:AMD 制造商全稱(chēng):Advanced Micro Devices 功能描述:enhanced Integrated Multiport Repeater Plus (eIMR+⑩)
AM79C985KCW 制造商:AMD 制造商全稱(chēng):Advanced Micro Devices 功能描述:enhanced Integrated Multiport Repeater Plus (eIMR+⑩)
AM79C985WW WAF 制造商:Advanced Micro Devices 功能描述:
AM79C987 制造商:AMD 制造商全稱(chēng):Advanced Micro Devices 功能描述:Hardware Implemented Management Information Base (HIMIB) Device
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*