Datasheet MN6650A Datasheet (Panasonic)

For Audio Equipment

MN6650A

Signal Processing LSI for CD Players

Overview

The MN6650A is a digital servo LSI for creating high­precision servo systems with completely self-adjusting
focus, tracking, and traverse servos.

Features

Focus servo
Tracking servo
Traverse servo
Automatic adjustment functions for FO/TR gain, FO/
TR offset, and FO/TR balance

PWM output with tristate output from a single pin

Built-in dropout countermeasures
Anti-shock functions
Support for both linear motor and screw-based traverse
mechanisms
Function to prevent runaway traverse operation

Support for 3- and 1-beam systems

Support for double-speed playback
Microcomputer serial interface
Operating voltage 4.5 to 5.5V

Pin Assignment

RST

TLOCK

XI

TO

T1
T2
T3
T4
T5

T6
VDET
TBAL

TRCRS

3332313029282726252423

34
35
36
37
38
39
40
41
42
43
44

1234567891011

TEST

PLAY

FLOCK

SENSE

DO

RFDET

MLD

MCLK

OFT

ARF

MDATA

TRON

CLVS

TE

PBO

WVEL

V

FE

SS

TEST

22
21
20
19
18
17
16
15
14
13
12

VR2

KICK
TRD
FOOD
TVD
TRV
V

DD

AV

DD

AV

SS

V

SS

LDON
VR1

Applications

CD Players

(TOP VIEW)

QFP044-P-1010

MN6650A For Audio Equipment

Block Diagram

10

FE

TE
PBO
VR1
VR2

9
8
12
11

A/D
CONVERTER

CPU

OUTPUT

PORT

13

26
31
32

2

1

LDON
PLAY
TRON
FLOCK
TLOCK
TES

WVEL

SENSE

MDATA

MCLK

MLD

7
30
27
28
29

MICRO­COMPUTER
INTERFACE

TIMING
GENERATOR

3

5

34

XI

OFT

RFDET

INPUT PORT

TRACK
COUNTER

42

4

25

DO

CLVS

VDET

44

TRCRS

16

DD

AV

17

V

DD

15

AV

PWM

14

SS

SS

V

33

23

RST

TEST

T0 to 3

22
18
20
21
19
43

T4 to 6

KICK
TRV
FOD
TRD
TVD
TBAL

For Audio Equipment MN6650A

Pin Descriptions

Pin No. Symbol I/O Function Description

1 TES O Tracking error shunt signal. "H" level: shunt.
2 PLAY O Play signal output. "H" level: play.
3 RFDET I RF detection signal input. "L" level: detected.
4 DO I Dropout signal input. "H" level: dropout
5 OFT I Offtrack signal input. "H" level: offtrack.
6 ARF I RF signal input.
7 WVEL O Double-speed status signal output. "H" level: double-speed.
8 PBO I Potentiometer signal input. (analog input)

9 TE I Tracking error signal input. (analog input)
10 FE I Focus error signal input. (analog input)
11 VR2 I Reference voltage for A/D converter. "L" level.
12 VR1 I Reference voltage for A/D converter. "H" level.
13 LDON O Laser ON signal output. "H" level: ON.
14 V
15 AV
16 AV
17 V

SS

SS

DD

DD

18 TRV O Traverse forced feed output. (tristate)
19 TVD O Traverse drive output. (tristate)
20 FOD O Focus drive output. (tristate)
21 TRD O Tracking drive output. (tristate)
22 KICK O Kick pulse output. (tristate)
23 TEST I Test pin. Keep this at "H" level.
24 V

SS

25 CLVS I Spindle servo phase synchronization signal output. "H" level: CLV.

26 TRON O Tracking servo ON signal. "L" level: ON.
27 MDATA I Microcomputer command data input.
28 MCLK I Microcomputer command clock input. (Data is latched at rising edge.)
29 MLD I Microcomputer command load signal input. "L" level: load.
30 SENSE O Sense signal output. (OFT, FESL, NACEND, NAJEND, POSAD, and SFG)
31 FLOCK O Focus servo pull-in signal. "L" level: pull-in state.
32 TLOCK O Tracking servo pull-in signal. "L" level: pull-in state.
33 RST I Reset input. "L" level: reset.
34 XI I Clock input. (f

35 T0 O Test pin. Leave open.
36 T1 O Test pin. Leave open.
37 T2 O Test pin. Leave open.
38 T3 O Test pin. Leave open.

I Ground for digital circuits. (0 V)
I Ground for analog circuits. (0 V)
I Power supply for analog circuits. (+5 V)
I Power supply for digital circuits. (+5 V)

I Ground for digital circuits. (0 V)

=16.9344 MHz) (Capacitor coupling requires a minimum

XI

of 1.0 Vpp.)

"L" level: rough servo.

MN6650A For Audio Equipment

Pin Descriptions (continued)

Pin No. Symbol I/O Function Description

39 T4 I Test pin. Keep this at "L" level.
40 T5 I Test pin. Keep this at "L" level.
41 T6 I Test pin. Keep this at "L" level.
42 VDET I Vibration detection signal input. "H" level: vibration detected.
43 TBAL O Tracking balance adjustment output. (tristate)
44 TRCRS I Track cross signal input.

For Audio Equipment MN6650A

Package Dimensions (Unit: mm)

QFP044-P-1010

34

44

(1.00)

12.30

10.00

33

±0.40

±0.20

23

22

(1.00)

±0.20

±0.40

10.00

12.30

12

111

0.80

0.35

±0.10

±0.20

±0.30

1.15

±0.20

0.10
SEATING PLANE

2.00

±0.10

0.10

2.10

0.05

-

+0.10

0.15

0.60

0 to 10°

±0.20