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PDF HA12188AF Data sheet ( Hoja de datos )
| Número de pieza | HA12188AF | |
| Descripción | Pre-Amplifier and Servo IC for Quadruple-Speed CD-ROM | |
| Fabricantes | Hitachi Semiconductor | |
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HA12188AF
Pre-Amplifier and Servo IC for Quadruple-Speed CD-ROM
ADE-207-183(Z)
1st. Edition
October 1995
Description
The typical values of built-in capacitances in this IC are reduced 10% compared with those in IC
HA12188F. The values of Electrical Characteristics of this IC are same as those of IC HA12188F.
Functions
• RF amplifier
• Focus error amplifier
• Tracking error amplifier
• FOK detector
• Mirror detector
• Defect detector
• APC amplifier
• Focus, tracking, and sled servo control
• Inner/outer direction detector
Features
• Built-in variable resistors for adjusting tracking error EF balance, tracking gain, and focus gain
• Single power supply
• Supports double and quadruple speeds
• Few external components
• FP-56 package
1 page  
Pin Descriptions and Equivalent Circuits (cont)
Pin No.
20
Symbol
DRT
Equivalent Circuit
VCC
10 k
HA12188AF
Function
Defect signal output or inner/outer
direction signal output
21 COUT
22 SENS
23 XRST
24 DC
25 XLT
26 DATA
27 CLK
28 LDS
29 DFIN
30 DFO
50 k
50 k
43 k
COUT output
SENS output
Reset input
DC input
XLT input
Data input
Clock input
Laser switch input
Defect comparator input
Defect envelope signal output
31 DFH
Defect hold signal output
Rev.1, Oct. 1995, page 5 of 35
5 Page 
HA12188AF
Table 2 Access Control Mode
DATA
ST1
ST2
ST3
D3 D2 D1 D0 TM6 TM5 TM4 TM3 TM2 TM1 TM6 TM5 TM4 TM3 TM2 TM1 TM6 TM5 TM4 TM3 TM2 TM1
$20 0 0 0 0
$21 0 0 0 1
$22 0 0 1 0
$23 0 0 1 1
$24 0 1 0 0
$25 0 1 0 1
$26 0 1 1 0
$27 0 1 1 1
$28 1 0 0 0
$29 1 0 0 1
$2A 1 0 1 0
$2B 1 0 1 1
$2C 1 1 0 0
$2D 1 1 0 1
$2E 1 1 1 0
$2F 1 1 1 1
A circle means that the switch is ON.
Note:
After the microprocessor sends serial data, TM1 to TM6 can be switched among the states listed
under ST1 to ST3 by input at the DC pin. First, if the microprocessor sends serial data when DC is
high, TM1 to TM6 are placed in the state listed under ST1. When DC is brought low, the states
change to the states listed under ST2. Then if DC is brought high again, the states change to the
states listed under ST3.
Rev.1, Oct. 1995, page 11 of 35
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HA12188AF.PDF ] | |
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