參數(shù)資料
型號(hào)： 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(yè)數(shù)： 24/44頁(yè)
文件大小： 222K
代理商： AM79C984AJC
P R E L I M I N A R Y
24
Am79C984A
SET (Write Commands)
Chip Programmable Option
SI Data
SO Data
0000 10S0
None
The eIMR chip programmable option can be enabled
(or disabled) by setting (or resetting) the S bit in the
command string.
S
AUI SQE Test Mask
Setting this bit allows the eIMR chip to ignore activity on
the CI signal pair, during the SQE test window, following
a transmission on the AUI port. Enabling this function
does not prevent the reporting of this condition by the
eIMR device. The two functions operate independently.
The SQE Test Window, as defined in IEEE 802.3 (Sec-
tion 7.2.2.2.4) is from 6 bit times to 34 bit times (0.6
to 3.4
μ
s). This includes the delay introduced by a 50-
meter AUI. CI activity that occurs outside this window is
not ignored and is treated as a true collision.
μ
s
Alternate AUI Partitioning Algorithm
SI Data
SO Data
0001 1111
None
Invoking this command sets the partition/reconnection
scheme for the AUI port to the alternate (transmit-only)
reconnection algorithm. To return the AUI port to the
standard (transmit or receive) reconnection algorithm,
it is necessary to reset the eIMR device. The standard
partitioning algorithm is selected on reset.
Alternate TP Partitioning Algorithm
SI Data
SO Data
0001 0000
None
Invoking this command sets the partition/reconnection
scheme for the TP ports to the alternate (transmit-only)
reconnection algorithm. To return the TP ports to the
standard (transmit or receive) reconnection algorithm,
it is necessary to reset the eIMR device. The standard
partitioning algorithm is selected on reset.
AUI Port Disable
SI
SO Data
0010 1111
None
This command disables the AUI port. Subsequently, the
eIMR chip will ignore all inputs to this port and will not
transmit a DAT or JAM pattern on the AUI port. Disabling
the AUI port also sets the partitioning state machine of
the AUI port to the idle state. Therefore, a partitioned
port can be reconnected by first disabling the AUI port
and then enabling the AUI port.
AUI Port Enable
SI
SO Data
0011 1111
None
This command enables the AUI port.
TP Port Disable
SI Data
SO Data
0010 00##
None
This command disables the TP port designated by the
two least-significant bits of the command byte. Subse-
quently, the eIMR chip will ignore all inputs to the des-
ignated port and will not transmit a DAT or JAM pattern
on that port. Disabling the TP port also sets the parti-
tioning state machine of that port to the idle state. There-
fore, a partitioned port can be reconnected by first
disabling the port and then enabling it.
TP Port Enable
SI Data
SO Data
0011 00##
None
This command enables the TP port designated by the
two least-significant bits of the command byte.
Disable Link Test Function (Per TP port)
SI Data
SO Data
0100 00##
None
This command disables the Link Test function of the TP
port designated by the two least-significant bits of the
command data. As a consequence of this, the port will
no longer be disconnected if it fails the Link Test. If a
port has the Link Test disabled, reading the Link Test
Status indicates a ‘Link Pass’.
Enable Link Test Function (Per TP port)
SI Data
SO Data
0101 00##
None
This command enables the Link Test function of the TP
port designated by the two least-significant bits of the
command data. As a consequence of this, the port is
disconnected if it fails the Link Test.
Disable Link Pulse (Per TP Port)
SI Data
SO Data
0100 10##
None
This command disables the transmission of the Link
pulse on the TP port designated by the two least-
significant bits of the command byte.
Enable Link Pulse (Per TP Port)
SI Data
SO Data
0101 10##
None
This command enables the transmission of the Link
pulse on the TP port designated by the two least-
significant bits of the command byte.
相關(guān)PDF資料
PDF描述
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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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