– 21 –

CXA1372BQ/BS

Envelope

Detection

[∗B]

[∗E]

RFI

(TZC)

Tracking error

(Latch)

Q

D

CK

(MIRR)

[∗C]

[∗F]

[∗G]

BRK

D2

TM7

Low: open

High: make

[∗A]

[∗D]

Waveform

Shaping

Waveform

Shaping

Edge Detection

39

42

[∗H]

Fig. 6. TM7 operation (brake circuit)

From inner to outer track

0V

From outer to inner track

("MIRR")

("TZC")

Braking is

applied from

here.

[∗A]

[∗B]

[∗C]

[∗D]

[∗E]

[∗F]

[∗G]

[∗H]

Fig. 7. Internal waveform

3. $2X (“TZC” at SENS (Pin 27))

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

01: Servo ON

10: F-JUMP

10: F-FAST FORWARD

11: R-JUMP

11: R-FAST FORWARD

↓↓

TM1, TM3, TM4

TM2, TM5, TM6