參數(shù)資料
型號(hào)： AM79C901AVIT
廠商： Advanced Micro Devices, Inc.
英文描述： HomePHY Single-Chip 1/10 Mbps Home Networking PHY
中文描述： HomePHY單芯片的1 / 10 Mbps的家庭網(wǎng)絡(luò)物理層
文件頁(yè)數(shù)： 37/90頁(yè)
文件大小： 714K
代理商： AM79C901AVIT
Am79C901A
37
P R E L I M I N A R Y
Header AID Remote Control Word Commands
Stations may be configured either as master stations
or as slave stations. Only one master may exist on a
given HomePNA segment or network over which the
HomePNA PHY header is preserved.
The master station may send commands embedded in
the HomePNA header control word to remotely set var-
ious parameters of the remote slave stations. Stations
are identified via the AID as follows:
1. The master station is identified on the HomePNA
wire network with an AID of FFh.
2. A slave is identified with an AID of 00h to EFh.
3. AID values of F0h to FEh are reserved for future use.
Once a command has been transmitted, the master
station will revert to a slave AID, so that subsequent
control words are not interpreted by the slave stations
as new commands.
Master mode is entered by writing to the PHY control
register (HPR16, bits 8 to 11) and is exited upon the
completion of the command sequence.
A valid master remote command consists of three
HomePNA frames with an AID of FFh. Since the
HomePNA PHY header is prepended to packets re-
ceived from the MAC, as well as any1Home packets,
packets from the master station may be separated by
intervals during which other (slave) stations may
transmit their frames.
A remote master Control Word command will be recog-
nized and executed by a HomePNA PHY when it re-
ceives three consecutive valid HomePNA frames with
an AID of FFh.
Valid commands are as follows:
1. SET_POWER: Commands slave stations to set
their transmit level to a prescribed level until another
master command is received.
2. SET_SPEED: Commands slave stations to set their
transmit speed to a prescribed value until another
master command is received.
The control word bit encoding and possible values are
described in Table 9.
Table 9.
Master Station Control Word Functions
Slave stations transmit the following status messages
in the HomePNA header control word of all outgoing
frames:
1. VERSION_STATUS: The HomePNA PHY version of
the slave station. The receiving station must revert to
this version to interpret the packet.
2. POWER_STATUS: The transmit power level of the
transmitting slave station for the current frame. All
HomePNA units support both LOW_POWER and
HIGH_POWER modes of operation.
3. SPEED_STATUS: The transmit speed of the slave
station for the current frame. Receiving stations will
adjust their receiver parameters to correctly interpret
this frame.
The slave control word bit encoding is identical to the
master control word format.
1 Mbps HomePNA PHY Loopback
The HomePNA PHY is capable of supporting internal
loopback only.
Internal Loopback
In internal loopback, the transmitted data is returned to
the receive data bus without transmitting data on the
network. The MAC must be programmed to support
full-duplex operation and is responsible for comparing
the transmitted data to that received. Internal loopback
is accomplished by setting the
“
enable loopback mode
”
in HPR0, bit 14, to 1.
any1Home Link Detection
While consuming minimal network resources, AMD
’
s
innovative any1Home Link Detection Packet provides a
means to indicate to the MAC, and thus the upper lay-
ers of the system protocol, that a valid network (as de-
fined by HomePNA) has been detected. The Link
Detection Packet is also capable of detecting a network
failure and allows the upper layer protocol to take cor-
rective action. Thus, the any1Home Packet provides
link indication that the MAC requires for compliance to
the Microsoft PC98, PC99, and HomePNA revision 1.1
requirements without utilizing resources from the upper
layers of the system protocol
AID
Bit No.
Command Function
5
LSB
0 = version 0
5
MSB
0 = Set to low-power transmit mode.
1 = Set to high-power transmit mode.
6
LSB
0 = Set to low-speed transmit mode.
1 = Set to high-speed transmit mode.
6
MSB
Reserved
相關(guān)PDF資料
PDF描述
AM79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE)
AM79C90JC CMOS Local Area Network Controller for Ethernet (C-LANCE)
AM79C90JCTR KPTC6CG10-6P
AM79C90PC CMOS Local Area Network Controller for Ethernet (C-LANCE)
AM79C90PCTR CMOS Local Area Network Controller for Ethernet (C-LANCE)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C90JC 制造商:Rochester Electronics LLC 功能描述:
AM79C90JC-G 制造商:Rochester Electronics LLC 功能描述:
AM79C90JCTR 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:CMOS Local Area Network Controller for Ethernet (C-LANCE)
AM79C90PC 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:CMOS Local Area Network Controller for Ethernet (C-LANCE)
AM79C90PCB 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Node Controller
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

*
*
*