HA12220 Hitachi Semiconductor, HA12220 Datasheet - Page 8

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

HA12220F
Table 1
Rev.1, Apr. 1997, page 8 of 20
Note: 1. Both tracking error and focus error gains are increased by 12dB. The RFAGC block gain is
Focus error gain
CD-RW
Focus error offset
Variable resistor BAL for
tracking error EF balance
also increased by 12dB.
Serial Data Control Command 1
D7D6D5
0 0 0
0 0 1
0 1 0
CD-RW
D4
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
D4
D4
*1
1
0
D3
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
D2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
D3
D3
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
1
1
1
1
D3
DATA
D1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
D2
D2
0
1
1
0
1
1
1
0
0
1
1
0
0
0
1
1
0
0
1
1
Focus error gain
D1
D1
336k
344k
352k
360k
368k
376k
384k
392k
400k
408k
416k
424k
432k
440k
448k
456k
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
BAL
D2
Gain (dB)
Offset (V)
+7.9
+4.3
+0.7
+0.6
+0.5
+0.4
+0.3
+0.2
+0.1
–0.1
–0.2
–0.3
–0.4
–0.5
–0.6
–0.7
±0
–4
–8
0
–16%
–14%
–12%
–10%
+10%
+12%
+14%
Ratio
–8%
–6%
–4%
–2%
±0%
+2%
+4%
+6%
+8%
D1
D0
0
0
0
Note