Philips AX1000, Service Manual

Page: 12 / 22

PINNING OF INTERGATED CIRCUITS
3-2 3-2
PCS 107 195
SAA7324 – DECODER, DIGITAL SERVO IC AND D/A-CONVERTER CD10 (low voltage version)
Pin Name Direction Description
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
1 HFREF
Æ
CD10 comparator common mode input
2 HFIN
Æ
CD10 comparator signal input
3 ISLICE CD10
Æ
current feedback from data slicer
4 VSSA1 GND analog ground 1
5 VDDA1 +2.7 analog supply voltage 1
6 IREF CD10
Æ
reference current output pin
7 VRIN CD10
Æ
reference voltage for servo ADC’s
8 D1 HF-preamp
Æ
CD10 unipolar current input (central diode signal input)
9 D2 HF-preamp
Æ
CD10 unipolar current input (central diode signal input)
10 D3 HF-preamp
Æ
CD10 unipolar current input (central diode signal input)
11 D4 HF-preamp
Æ
CD10 unipolar current input (central diode signal input)
12 R1 HF-preamp
Æ
CD10 unipolar current input (satellite diode signal input)
13 R2 HF-preamp
Æ
CD10 unipolar current input (satellite diode signal input)
14 VSSA2 GND analog ground 2
15 CROUT CD10
Æ
X-TAL crystal/resonator output
16 CRIN X-TAL
Æ
CD10 crystal/resonator input
17 VDDA2 +2.7 analog supply voltage 2
18 LN CD10
Æ
DAC left channel differential output - negative
19 LP CD10
Æ
DAC left channel differential output - positive
20 VNEG
Æ
CD10 DAC negative reference input
21 VPOS
Æ
CD10 DAC positive reference input
22 RN CD10
Æ
DAC right channel differential output - negative
23 RP CD10
Æ
DAC right channel differential output - positive
24 SELPLL +2.7 selects whether internal clock multiplier PLL is used
25 TEST1 GND test control input 1; this pin should be tied low
26 CL16 CD10
Æ
16.9344 MHz system clock output
27 DATA CD10
Æ
NPC serial data output (3-state)
28 WCLK CD10
Æ
NPC word clock output (3-state)
29 SCLK CD10
Æ
NPC serial bit clock output (3-state)
30 EF CD10
Æ
C2 error flag output (3-state)
31 TEST2 GND test control input 2; this pin should be tied low
32 KILL CD10
Æ
HF-preamp kill output (programmable; open-drain)
33 VSSD1 GND digital ground 2
34 V2/V3 CD10
Æ
NPC versatile I/O: input versatile pin 2 or output versatile pin 3 (open-drain)
35 WCLI NPC
Æ
CD10 word clock input (for data loopback to DAC)
36 SDI NPC
Æ
CD10 serial data input (for data loopback to DAC)
37 SCLI NPC
Æ
CD10 serial bit clock input (for data loopback to DAC)
38 RESETn µP
Æ
CD10 power-on reset input (active low)
39 SDA µP
´
CD10 microcontroller interface data I/O line (open-drain output)
40 SCL µP
Æ
CD10 microcontroller interface clock line input
41 RAB µP
Æ
CD10 microcontroller interface R/W and load control line input (4-wire bus mode)
42 SILD µP
Æ
CD10 microcontroller interface R/W and load control line input (4-wire bus mode)
43 STATUS CD10
Æ
servo interrupt request line/decoder status register output (open-drain)
44 TEST3 GND test control input 3; this pin should be tied low
45 RCK
Æ
CD10 subcode clock input
46 SUB CD10
Æ
P-to-W subcode bits output (3-state)
47 SFSY CD10
Æ
µP subcode frame sync output (3-state)
48 SBSY CD10
Æ
NPC subcode block sync output (3-state)
49 CL11/4 CD10
Æ
11.2896 MHz or 4.2336 MHz (for microcontroller) clock output
50 VSSD2 GND digital ground 3
51 DOBM CD10
Æ
bi-phase mark output (externally buffered; 3-state)
52 VDDD1P +2.7 digital supply voltage 2 for periphery
53 CFLG CD10
Æ
correction flag output (open-drain)
54 RA CD10
Æ
servo driver radial actuator output
55 FO CD10
Æ
servo driver focus actuator output
56 SL CD10
Æ
servo driver slide control output
57 VDDD2C +2.7 digital supply voltage 3 for core
58 VSSD3 GND digital ground 4
59 MOTO1 CD10
Æ
servo driver motor output 1; versatile (3-state)
60 MOTO2 CD10
Æ
motor output 2; versatile (3-state)
61 V4 CD10
Æ
HF-EQ switch versatile output pin 4
62 V5 CD10
Æ
HF-GAIN switch versatile output pin 5
63 V1 innerswitch
Æ
CD10 versatile input pin 1
64 LDON CD10
Æ
HF-preamp laser drive on output (open-drain)
PLAY
pressed ?
µP sends
command to CD10:
“move slide inside”
µP accelerates
disc motor for
~200ms
inner switch
closed within
~6s ?
µP sends
command to CD10:
“move slide outside”
µP sends
commands to CD10:
“slide servo off”
µP sends
commands to CD10:
“laser on”
“focus servo on”
µP resets
CD10 and NPC
(via PORES)
µP switches
servo driver on
(via OE)
µP initializes
CD10 with default
parameter/settings
inner switch
open within
~0.25s ?
Start-up procedure for ext.DC supply,
no accu inserted, hold-switch in off pos.,
resume-mode off, CD-door closed.
N
N
N
Y
TOC
found within
~30s ?
N
Y
Y
Y
POWER OFF
(stand-by)
focus found
during ramping
cycle ?
µP accelerates
disc to nom. speed
DC/DC converter
is switched on
(via WAKE)
Y
N
jump
ok ?
µP initializes
radial servo loop
(~330ms)
µP releases
muting
(via MUTE)
µP sends command
to CD10: “jump
10 tracks inside”
Y
Y
subcode
ok ?
N
N
Y
Y
N
PLAY-MODE
N
N
display shows
“
no d1SC
”
start-up stopped
display shows
“ nF d1SC ”
start-up stopped
disc at nom.
speed within
~10s ?
N
focus
stability test
ok ?
µP sends new focus
parameters to CD10
(switch to higher
focus sensitivity)
switch back to
normal focus
sensitivity
Y
already
looped through
all (4) focus
sensitivities
?
re-initialize CD10
and restart focus
search procedure
N
Y
Y
re-initialize CD10
and restart focus
search procedure
N
focus found
during ramping
cycle ?
subcode
error handler
radial
error handler
N
µP sends new focus
parameters to CD10
(switch to higher
focus sensitivity)
Y
already
looped through
all (4) focus
sensitivities
?
Y
focus found
during ramping
cycle ?
focus found
during ramping
cycle ?
STARTUP PROCEDURE