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參數(shù)資料
| 型號： | AM79C984AJC |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | 網(wǎng)絡(luò)接口 |
| 英文描述： | enhanced Integrated Multiport Repeater (eIMR⑩) |
| 中文描述： | DATACOM, ETHERNET TRANSCEIVER, PQCC84 |
| 封裝： | PLASTIC, LCC-84 |
| 文件頁數(shù)： | 29/44頁 |
| 文件大?。?/td> | 222K |
| 代理商： | AM79C984AJC |
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P R E L I M I N A R Y
Am79C984A
29
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 10a. Notice that DI is connected to DO
of the MAC and DO is connected to DI of the MAC,
because the reverse configuration only affects CI.
Where CI is an input in the normal mode, in the reverse
mode, CI is an output. Figure 10b shows the normal AUI
configuration for reference.
Figure 10. 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 11.
.
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 12 shows
the configuration for the IMR+ mode of operation.
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
20650A-16
20650B-15
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AM79C984AKCW | Circular Connector; No. of Contacts:6; Series:MS27474; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:8; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:8-35 RoHS Compliant: No |
| AM79C985JC | enhanced Integrated Multiport Repeater Plus (eIMR+⑩) |
| AM79C985 | enhanced Integrated Multiport Repeater Plus (eIMR+⑩) |
| AM79C985KCW | enhanced Integrated Multiport Repeater Plus (eIMR+⑩) |
| AM79C987 | Hardware Implemented Management Information Base (HIMIB) Device |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM79C984AKC\\W | 制造商:Advanced Micro Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述: |
| AM79C984AKC\W | 制造商:Advanced Micro Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述: |
| AM79C984AKCW | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:enhanced Integrated Multiport Repeater (eIMR⑩) |
| AM79C984APLUTS | 制造商:Advanced Micro Devices 功能描述: |
| AM79C984AWW WAF | 制造商:Advanced Micro Devices 功能描述: |
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