HA12220F データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HA12220F

CD-ROM Drive Head Amplifier IC

Hitachi -> Renesas Electronics 

Table 2 Serial Data Control Command 2

HA12220F

Tracking error gain

Tracking error filter

Mirror

Defect

APC ON

FOK Vth

Stand-by

RFEQ

D7D6D5 D4

100 —

DATA

D3

D2

D1

Tracking error gain

D3 D2 D1

000

011

010

101

110

Gain (dB)

0

–4

–8

+7.9

+4.3

Note

D0

0

101

0

Mirror, Defect *1

D3 D2 Mode

Tracking error 0 0 Normal

filter

01

4×

D4 D1 1 1

8×

1 1 30kHz

0 1 60kHz

1 0 100kHz

0 0 200kHz

110

FOK Vth

D4 D3 Vth

1 1 –12dB

0 1 –6dB

0 0 0dB

1 0 Prohibit

Stand-by

ON

APC ON

0 Stand-by

mode is

cleared by

setting

XRST on.

1 1 1 SC4

SC3

SC2

SC1 0

*2

Note: 1. Switches the mirror circuit and the defect circuit internal time constants at the same time.

Don’t use D3 = “1”, D2 = “0” mode.

2. The switch name surrouded by circle means that the switch turns on when the

corresponding bit is “1”. This switch changes the value of the RF peaking capacitor.

In case of peaking off all switches must be set off.

Rev.1, Apr. 1997, page 9 of 20

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