HA12188AF データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HA12188AF

Pre-amplifier and servo IC for quadruple-speed CD-ROM

Hitachi -> Renesas Electronics 

HA12188AF

Table 1 Microprocessor Control Commands

Focus mode

Tracking mode and FS1

DRT setting

Access control mode

D7D6D5D4 D3

0 0 0 0 FS4

DRT *3

0 0 0 1 0: Defect

1: Direction

DATA *1

D2

*2

DEFECT

OFF

TM7 *4

D1

FS2

FS1 current

*5

0010

See table 2

D0

FS1

THS

SENS

FZC

H

TZC

Pulse setting mode

Speed setting mode

TM3, TM4 current *6

TM5, TM6 current *6

D3 D2 Current value D1 D0 Current value

0011 0 0

32µA

00

32µA

H

01

16µA

01

16µA

10

24µA

10

24µA

11

8µA

11

8µA

Mirror *7

Focus

tracking

RF

D3 D2 Mode

0100

00

01

Normal

Double

FLS FPS RS1 RS2

H

1 1 Quadruple

TLS TPS

EF balance adjustment 0 1 0 1

BAL2

BAL1

BAL0

H

Tracking gain and focus

0 ; Focus

gain

GF2

gain adjustment

0110

1 ; Tracking GT2

gain

GF0

H

GT0

H

Notes: 1. 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”.

2. “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).

3. DRT (pin 20) outputs defect signal when the corresponding bit is “0”, and outputs direction

signal when the corresponding bit is “1”.

4. TM7 can turn on only when COUT is high.

5. The value of two current sources over switch FS1 are 18 µA(source) 36 µA(sink) when the

corresponding bit is “1”, and are 9 µA(source) 18 µA(sink) when the corresponding bit is “0”.

6. The current values through switches TM3, TM4, TM5 and TM6 can be selected in four steps.

7. The speed of Mirror circuit can be selected in three steps. Don’t use D3 = “1”, D2 = “0” mode.

Rev.1, Oct. 1995, page 10 of 35

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