Philips AZ-2040 Manual de serviço - Página 9

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Philips AZ-2040 Manual de serviço
Abbreviations and Pin-description of CD ICs
Abbreviations and Pin-description of CD Ics
SERVO PROCESSOR SAA7325H
SYMBOL
PIN
HFREF
1
comparator common mode input
HFIN
2
comparator signal input
ISLICE
3
current feedback output from data slicer
(1)
4
V
analog ground 1
SSA1
(1)
5
V
analog supply voltage 1
DDA1
I
6
reference current output pin
ref
V
7
reference voltage for servo ADC's
RIN
D1
8
unipolar current input (central diode signal input)
D2
9
unipolar current input (central diode signal input)
D3
10
unipolar current input (central diode signal input)
D4
11
unipolar current input (central diode signal input)
R1
12
unipolar current input (satellite diode signal input)
R2
13
unipolar current input (satellite diode signal input)
(1)
14
V
analog ground 2
SSA2
CROUT
15
crystal/resonator output
CRIN
16
crystal/resonator input
(1)
17
V
analog supply voltage 2
DDA2
LN
18
DAC left channel differential output - negative
LP
19
DAC left channel differential output - positive
V
20
DAC negative reference input
neg
V
21
DAC positive reference input
pos
RN
22
DAC right channel differential output - negative
RP
23
DAC right channel differential output - positive
SELPLL
24
selects whether internal clock multiplier PLL is used
TEST1
25
test control input 1; this pin should be tied LOW
CL16
26
16.9344 MHz system clock output
DATA
27
serial d4(1)ata output (3-state)
WCLK
28
word clock output (3-state)
SCLK
29
serial bit clock output (3-state)
EF
30
C2 error flag output (3-state)
TEST2
31
test control input 2; this pin should be tied LOW
KILL
32
kill output (programmable; open-drain)
(1)
V
33
digital ground 2
SSD1
V2/V3
34
versatile I/O: input versatile pin 2 or output versatile pin 3 (open-drain)
WCLI
35
word clock iutput (for data loopback to DAC)
SDI
36
serial data input (for data loopback to DAC)
SCLI
37
serial bit clock input (for data loopback to DAC)
RESET
38
power-on reset input (active LOW)
SDA
39
microcontroller interface data I/O line (open-drain output)
SCL
40
microcontroller interface clock line input
4 - 3
DESCRIPTION
Abbreviations and Pin-description of CD ICs
Abbreviations and Pin-description of CD Ics
SERVO PROCESSOR SAA7325H
SYMBOL
PIN
RAB
41
microcontroller interface R/W and load control line input (4-wire bus mode)
SILD
42
microcontroller interface R/W and load control line input (4-wire bus mode)
STATUS
43
servo interrupt request line/decoder status register output (open-drain)
TEST3
44
test control input 3; this pin should be tied LOW
RCK
45
subcode clock input
SUB
46
P-to-W subcode bits output (3-state)
SFSY
47
subcode frame sync output (3-state)
SBSY
48
subcode block sync output (3-state)
CL11/4
49
11.2896 MHz or 4.2336 MHz (for microcontroller) clock output
(1)
50
digital ground 3
V
SSD2
DOBM
51
bi-phase mark output (externally buffered; 3-state)
(1)
52
V
digital supply voltage 2 for periphery
DDD1(P)
CFLG
53
correction flag output (open-drain)
RA
54
radial actuator output
FO
55
focus actuator output
SL
56
sledge control output
(1)
57
V
digital supply voltage 3 for core
DDD2(C)
(1)
58
V
digital ground 4
SSD3
MOTO1
59
motor output 1; versatile (3-state)
MOTO2
60
motor output 2; versatile (3-state)
V4
61
versatile output pin 4
V5
62
versatile output pin 5
V1
63
versatile intput pin 1
LDON
64
laser drive on output (open-drain)
Note : All supply pins must be connected to the same external power supply voltage.
4 - 3
DESCRIPTION