- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄67685 > ICS1890Y-14 1 CHANNEL(S), 100M bps, SERIAL COMM CONTROLLER, PQFP64 PDF資料下載
參數(shù)資料
| 型號(hào)： | ICS1890Y-14 |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 1 CHANNEL(S), 100M bps, SERIAL COMM CONTROLLER, PQFP64 |
| 封裝： | TQFP-64 |
| 文件頁數(shù)： | 66/66頁 |
| 文件大?。?/td> | 1749K |
| 代理商： | ICS1890Y-14 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁當(dāng)前第66頁
9
ICS1890
In the event that the link partner does not support auto-
negotiation, backward compatibility is guaranteed because
legacy systems will not respond to the burst (called Fast Link
Pulses). 10Base-T systems will continue to send 10Base-T
link test pulses which will be interpreted by the ICS1890 as
a 10Base-T technology only device. 100Base-TX systems
would send scrambled idle symbols, which would be interpreted
by theICS1890as a 100Base-TX only device. Auto-negotiation
is invoked at power-up, upon request by management, or
manually.
Auto-Negotiation Progress Monitor
Under normal circumstances, Auto-Negotiation is able to
effortlessly establish a connection with the link partner. There
are, however, some situations that may prevent Auto-
Negotiation from completing properly. TheAuto-Negotiation
Progress Monitor is designed to provide detailed information
to a station management entity to assist it in making a connection
in the event that Auto-Negotiation is unable to establish a
connection by itself.
During normal Auto-Negotiation operation, the device ex-
changes capability information with its link partner and then
sets the Auto-Negotiation Complete bit in the Status register
(1:5) (also available in the QuickPoll register as bit 17:4) to a
logiconetoindicatethattheinformationexchangehascompleted
successfully and that Auto-Negotiation has handed off the
link startup process to the negotiated technology.
Auto-Negotiation can also accommodate legacy 10Base-T
and100Base-TXlinkpartnersthatdonot haveAuto-Negotiation
capability. In this case, Auto-Negotiation identifies the link
partner as not being Auto-Negotiation able by setting the
LP_AutoNeg_Able bit (6:0) to a logic zero, identifies the
legacy connection to be made by setting the single bit
corresponding to that technology in the AN Link Partner
Abilities Register (either bit 5:7 or 5:5), and finally indicates
Auto-Negotiation Complete.
The entire process, in either case, usually takes less than half
a second to complete. Typically, management will poll the
Auto-Negotiation Complete bit and then the Link Status bit to
determine when a connection has been successfully made
and then the actual type of connection can be determined by
management. This information is all contained in the QuickPoll
register.
When Auto-Negotiation fails, Auto-Negotiation Complete may
never become true or Link Status may never become good.
Station management can detect this condition and discover
why there is a failure to connect by using the detailed information
provided by the Auto-Negotiation Progress Monitor.
The Auto-Negotiation Progress Monitor provides four bits of
status in the QuickPoll Detailed Status register when combined
with the already present Auto-Negotiation Complete bit.
As progress is made through the Auto-Negotiation Arbitration
state machine, higher status values are locked in to the progress
monitor. The status value only is allowed to increase until
either Auto-Negotiation is completed successfully or the
progress monitor status is read by management.
After the status is read by management, the status is reset to
the current status of the Arbitration state machine. After
negotiation has completed successfully, any link failure will
cause the process to being anew.
This behavior allows management to always determine the
greatest forward progress made by the Auto-Negotiation logic.
Status
Progress Monitor Status Bits
A-N Complete
Bit 2
Bit 1
Bit 0
Idle
00
Parallel Detected
0
1
Parallel Detection Failure
0
1
0
Ability Matched
0
1
Acknowledge Match Failure
0
1
0
Acknowledge Matched
0
1
0
1
Consistency Match Failure
0
1
0
Consistency Matched
0
1
Auto-Negotiation Completed Successfully
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICS2059GI-02 | 27 MHz, VIDEO CLOCK GENERATOR, PDSO16 |
| ICS2304NZGI-1T | 2304 SERIES, LOW SKEW CLOCK DRIVER, 4 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8 |
| ICS2304NZG-1LF | 2304 SERIES, LOW SKEW CLOCK DRIVER, 4 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8 |
| ICS252MI-XXLF | 200 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| ICS252MI-XX | 200 MHz, OTHER CLOCK GENERATOR, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS1890Y-4 | 制造商:ICS 功能描述:1890Y-4 |
| ICS1891 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Transceiver |
| ICS1891Y | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Transceiver |
| ICS1892 | 制造商:ICS 制造商全稱:ICS 功能描述:10Base-T/100Base-TX Integrated PHYceiver |
| ICS1892Y | 制造商:ICS 制造商全稱:ICS 功能描述:10Base-T/100Base-TX Integrated PHYceiver |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。