HA12220 Hitachi Semiconductor, HA12220 Datasheet - Page 9

• Manufacturer Part Number: HA12220
• Description: CD-ROM Drive Head Amplifier IC
• Manufacturer: Hitachi Semiconductor

Table 2
Note: 1.
Tracking error filter
Mirror
Defect
APC ON
FOK Vth
Stand-by
Tracking error gain
RFEQ
2.
Switches the mirror circuit and the defect circuit internal time constants at the same time.
Don’t use D3 = “1”, D2 = “0” mode.
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.
Serial Data Control Command 2
D7D6D5
1 0 1
1 0 0
1 1 1
1 1 0
Tracking error
D4
1
0
0
1
D4
SC4
1
0
1
0
D4
—
filter
D3
1
1
0
0
D1
FOK Vth
1
1
0
0
30kHz
60kHz
100kHz
200kHz
Prohibit
–12dB
–6dB
0dB
Vth
D3
D3
SC3
0
0
1
0
0
0
1
1
D3
Mirror, Defect
DATA
D2
0
1
1
D2
Tracking error gain
0
1
1
0
1
Normal
Stand-by
Mode
D1
0
1
0
1
0
4
8
SC2
ON
D2
Gain (dB)
*1
+7.9
+4.3
Rev.1, Apr. 1997, page 9 of 20
–4
–8
0
APC ON
SC1
D1
D0
0
0
0
0
HA12220F
Stand-by
mode is
cleared by
setting
XRST on.
Note
*2