CXA1782CQ/CR
[ A]
[ B]
D2
[ G]
(MIRR)
[ C]
Waveform Shaping
RF_I
Envelope Detection
30
46
TM7
Low: open
High: make
D Q
CK
BRK
Tracking error
[ D]
[ E]
[ F]
(Latch)
CXA1782
Waveform Shaping
Edge Detection
(TZC)
Fig. 6. TMI movement during braking operation
From inner to outer track
From outer to inner track
[ A]
[ B]
(“MIRR”)
[ C]
[ D]
(“TZC”)
[ E]
[ F]
[ G]
[ H]
Braking is
applied from
here.
0V
Fig. 7. Internal waveform
3. $2X (“TZC” at SENS pin (Pin 24))
These commands deal with turning the tracking servo and sled servo ON/OFF, and creating the jump pulse
and fast forward pulse during access operations.
D7
D6
D5
D4
D3
D2
D1
D0
0
0
1
0
Tracking
Sled
control
control
00: OFF
00: OFF
01: Servo ON
10: F-JUMP
11: R-JUMP
↓
01: Servo ON
10: F-FAST FORWARD
11: R-FAST FORWARD
↓
TM1, TM3, TM4
TM2, TM5, TM6
– 25 –
ETC [ ETC ]
