參數(shù)資料
型號(hào): MC92600
廠商: Motorola, Inc.
英文描述: High-speed, Full-duplex, Serial Data Interface(高速全雙工串行數(shù)據(jù)接口)
中文描述: 高速,全雙工,串行數(shù)據(jù)接口(高速全雙工串行數(shù)據(jù)接口)
文件頁(yè)數(shù): 39/82頁(yè)
文件大?。?/td> 1056K
代理商: MC92600
Chapter 4. System Considerations
4-1
Chapter 4
System Considerations
This chapter describes the system considerations of the WarpLink Quad start-up and
initialization, and explains the proper use of the standby and repeater modes.
4.1 Start-up
The WarpLink Quad begins a start-up sequence upon application of the reference clock
(REF_CLK input) to the device. This is considered a cold start-up. The receiver requires
that byte alignment is reached before data can be transmitted. If word synchronization is
selected, then word alignment must occur. The steps in the cold start-up sequence are as
follows:
1. PLL start-up
2. Receiver initialization and byte alignment
3. Word alignment (if enabled)
4. Run
The expected duration of each step in the start-up sequence is shown in Table 4-1. A cold
start-up can be initiated at any time by asserting the RESET_B signal low. It is
recommended that RESET_B be set low at initial start-up, however, it is not strictly
required.
4.2 Standby Mode
Standby mode puts the WarpLink Quad into a low power, inactive state. When STNDBY is
Table 4-1. Start-up Sequence Step Duration
Start-up Step
Typical Duration
(in Bit Times)
Note
PLL start-up
10240 + 25
m
s
Receiver initialization
50
WSE = low
160
WSE = high
Word alignment
50
WSE = low
160
WSE = high
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