參數(shù)資料
型號： P32P4911A
廠商： NXP SEMICONDUCTORS
元件分類： 光電元器件
英文描述： PRML Read Channel with PR4, 8/9 ENDEC, FWR Servo
中文描述： 1 CHANNEL READ CHANNEL, PQFP100
封裝： 14 X 14 X 1.40 MM, PLASTIC, LQFP-100
文件頁數(shù)： 37/63頁
文件大?。?/td> 257K
代理商： P32P4911A
1996 Jul 25
37
Philips Semiconductors
Product specification
PRML Read Channel with PR4,
8/9 ENDEC, FWR Servo
P32P4911A
Serial Port Register Definitions (Continued)
Complete Register ID String
A3
A2
A1
A0
S2
S1
S0
R/W
Write Precomp / Level
Threshold Time Constant
Register (WPLT)
1
Bits 7-6
1
TC2-1
0
Adaptive Level qualification threshold time constant for
Decision Directed Phase Detector. (Valid After SFC)
TC1
0
1
0
1
800 ns
Enable adaptive level qualification in Decision Directed
Phase Detector
0 = fixed level qualification
1 = adaptive mode
Freeze Channel Quality Factor and Asymmetry Factor at
Sync Byte Detect
0 = Update during read
1 = Freeze at SBD
Write Precomp setting
Write Precomp Magnitude
No precomp
2.1% code period shift
4.2% code period shift
6.3% code period shift
8.4% code period shift
10.5% code period shift
12.6% code period shift
14.7% code period shift
16.8% code period shift
21.0% code period shift
23.1% code period shift
25.0% code period shift
27.3% code period shift
29.4% code period shift
31.5% code period shift
0
0
1
0
0
C4H
TC2
0
0
1
1
Bit 5
Time Constant
200 ns
400 ns
600 ns
ALE
Bit 4
FREZQ
Bits 3-0
WPC3-0
WPC0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
WPC3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
WPC2
0
0
0
0
1
1
1
1
0
0
0
1
1
1
1
WPC1
0
0
1
1
0
0
1
1
0
1
1
0
0
1
1
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