參數(shù)資料
型號： 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
文件頁數(shù)： 9/35頁
文件大?。?/td> 248K
代理商： HA12188AF
HA12188AF
Rev.1, Oct. 1995, page 9 of 35
Operation
1. Microprocessor Control
The IC’s internal switches can be operated by sending control data from a microprocessor. The signal
timing is shown in figure 1, and the control commands are listed in table 1.
DATA
CLK
XLT
T1
T2
T3
T4
0
1
2
3
4
5
6
7
Item
Clock frequency
Clock pulse width
Delay time
Latch pulse width
Symbol
f
CLK
T1, T2
T3
T4
Min
—
0.96
1
2
Typ
—
—
—
—
Max
520
—
—
—
Unit
kHz
μ
s
μ
s
μ
s
Figure 1 Timing Diagram for Microprocessor Control
Signals from the microprocessor are input at pins 23 to 27. A low input at the XRST pin resets the IC.
Normally this pin should be kept high. (See figure 2.)
CLK
DATA
XLT
DC
XRST
SENS
COUT
DEFECT
or DRT
20
21
22
23
24
25
26
27
Input
I/F
Logic
Output
I/F
Figure 2 Microprocessor Interface
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