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參數(shù)資料
| 型號(hào)： | HA12188AF |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Pre-Amplifier and Servo IC for Quadruple-Speed CD-ROM |
| 中文描述： | 預(yù)放大器和四人間伺服集成電路高速的CD - ROM |
| 文件頁(yè)數(shù)： | 10/35頁(yè) |
| 文件大?。?/td> | 248K |
| 代理商： | HA12188AF |
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HA12188AF
Rev.1, Oct. 1995, page 10 of 35
Table 1
Microprocessor Control Commands
Focus mode
Access control mode
Pulse setting mode
DATA
D7D6D5D4
D3
D2
D1
D0
SENS
Tracking mode and FS1
DRT setting
Speed setting mode
EF balance adjustment
Tracking gain and focus
gain adjustment
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
FS4
DEFECT
OFF
FS2
FS1
FZC
DRT
0: Defect
1: Direction
TM7
THS
H
TZC
H
H
BAL2
BAL1
BAL0
H
0 ;
GF2
GF0
H
GT2
GT0
*4
TM5, TM6 current
TM3, TM4 current
Focus
tracking
Mirror
FS1 current
See table 2
RF
Focus
gain
1 ; Tracking
gain
FLS FPS
TLS TPS
RS1 RS2
H
*2
*7
D2
0
1
1
Mode
Normal
Double
Quadruple
D3
0
0
1
*3
*1
*5
D2
0
1
0
1
Current value
32
μ
A
16
μ
A
24
μ
A
8
μ
A
D3
0
0
1
1
*6
*6
D0
0
1
0
1
Current value
32
μ
A
16
μ
A
24
μ
A
8
μ
A
D1
0
0
1
1
Notes: 1.
2.
3.
4.
5.
6.
7.
The switch name surrounded by circle means that the switch turns on when the corresponding
bit is
“
1
”
. The switch name with bar surrounded by circle means that the switch turns on when
the corresponding bit is
“
0
”
.
“
DEFECT OFF
”
means that switches DS1 and DS2 don
’
t turn on when the corresponding bit
is
“
1
”
. Though the
“
DEFECT OFF
”
bit is set, the output at pin 20 is defect signal (in defect
signal output mode).
DRT (pin 20) outputs defect signal when the corresponding bit is
“
0
”
, and outputs direction
signal when the corresponding bit is
“
1
”
.
TM7 can turn on only when COUT is high.
The value of two current sources over switch FS1 are 18
μ
A(source) 36
μ
A(sink) when the
corresponding bit is
“
1
”
, and are 9
μ
A(source) 18
μ
A(sink) when the corresponding bit is
“
0
”
.
The current values through switches TM3, TM4, TM5 and TM6 can be selected in four steps.
The speed of Mirror circuit can be selected in three steps. Don
’
t use D3 =
“
1
”
, D2 =
“
0
”
mode.
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