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)： 32/63頁
文件大?。?/td> 257K
代理商： P32P4911A
1996 Jul 25
32
Philips Semiconductors
Product specification
PRML Read Channel with PR4,
8/9 ENDEC, FWR Servo
P32P4911A
REGISTER DESCRIPTIONS
Serial Port Register Definitions
Complete Register ID String
A3
A2
A1
A0
S2
S1
S0
R/W
Power Down Register (PD)
0
0
TPC/1-0
0
Test point C/D control (TME = 0)
0
0
1
0
0
04H
Bits 7-6
TPC+/TPC- TPD+/TPD- TPE
0X = disabled disabled disabled
1X = DP/DN CP/CN disabled SG = 1
1X = disabled disabled disabled SG = 0
Test Point C/D Control (TME = 1)
TPC
/D1-0
TPC+/TPC- TPD+/TPD- TPE(AGCSEL=0) TPE(AGSEL=1)
00* = disabled disabled disabled disabled
01 = DP/DN CP/CN disabled low-z oneshot
Servo calibration enabled
input mode to qualifiers, etc.
10 = DP/DN CP/CN full wave fastrec
rectifier out oneshot
output mode from filter/offset canceller
11 = filter filter full wave ultra fast
bypass bypass rectifier out decay ctrl.
Output select for ATO test point
00 = MAXREF/2
01 = DAC output enabled DAC test mode
10 = Amplitude Asymmetry Monitor output (QASYM) selected
11 = Channel Equalization Monitor output (Q) selected
Internal AC coupling enable/disable (TME = 0)
0 = Internal AC coupling, AGC switched to sample mode at
SFC
1 = Internal AC coupling, AGC is always in continuous mode
Internal AC coupling enable/disable (TME = 1)
0 = Internal AC coupling is enabled
1 = Internal AC coupling is disabled
Time Base Generator power down
0 = power up
1 = power down;
Data Separator power down
0 = power up
1 = power down;
AGC, Filter, Pulse Detector, and Servo power down
0 = power up
1 = power down;
Bits 5-4
ATOSEL
Bit 3
ACCPL
Bit 2
TB
Bit 1
DS
Bit 0
PD
* Servo calibration mode enabled, strobing must occur for operation.
Data Filter Cutoff Register (FC) 0
Bit 7
0
3TAPEN
0
3 Tap equalizer enable
0 = enable 5 tap equalizer (Normal operation)
1 = enable only 3 tap equalizer (4901 mode)
Filter cutoff frequency setting in non-servo mode
c (MHz) = 0
.
301 * FC - 1.142 44 < FC < 117
dec
1
0
1
0
0
14H
Bits 6-0
FC6-0
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