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參數(shù)資料
| 型號： | Am7968-125LKC |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| 中文描述： | TAXIchip集成電路（透明異步Xmitter，接收器接口） |
| 文件頁數(shù)： | 106/127頁 |
| 文件大?。?/td> | 730K |
| 代理商： | AM7968-125LKC |
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AMD
102
TAXIchip Integrated Circuits Technical Manual
TAXI T
echnical
I
nformation
P
ublication
#89-08
S ubjec t: T AX I Rec eiver Loc k T ime
Question:
In a fully operational system in which both the Transmitter and Receiver are powered
on, how long will it take for the Receiver to lock to new data after a quiet line
Answer:
When data transmission stops and the link becomes quiet, the TAXI Receiver PLL will
drift to its natural resting frequency which by design, is less than 3% away from the
reference frequency applied at the X1 pin.
When data appears on the line, the Receiver PLL will achieve phase lock in a time
which is proportional to the incoming data edge density and PLL loop bandwidth.
Because this lock time is dependent on the data being transmitted, the time it takes for
the receiver to lock will depend on the specific system application. In Section 3.3, three
types of data are represented and their calculated lock times are shown. By dividing the
lock time for a specific data pattern by the X1 clock period, the number of bytes to lock
the PLL can be calculated.
Because time to lock is dependent on many variables, it is represented as a typical time.
If time to lock is critical to the specific application, we suggest you allow at least the
times shown.
Although there is no guaranteed specification for time to lock, a test is run (using a JK
pattern) as part of AMD outgoing tests to ensure that all devices can achieve lock within
a reasonable time. The test is performed by sending JKs for 640
μ
s, and then without
interruption, a full rate functional test is run. For the test to pass, the PLL must lock to
the JK pattern and then track the incoming data perfectly.
相關PDF資料 |
PDF描述 |
|---|---|
| Am7969-125LKC | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| Am7968-175LKC | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| Am7969-175LKC | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| AM7968-125VB3A | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| AM7969-125VB3A | TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AM7968-125LMC | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| AM7968-125PC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Transmitter |
| AM7968-125PCB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Transmitter |
| AM7968-125VB3A | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
| AM7968-125VBXA | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:TAXIchip Integrated Circuits(Transparent Asynchronous Xmitter-Receiver Interface) |
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