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Abbreviations
SIGNAL PROCESSOR (CD18) SAA7825
SYMBOL
PIN
I/O
LFPOWER
1
I
laser power supply
EXFILTER
2
O
10 nF capacitor for laser start-up control
MONITOR
3
I
laser monitor diode
SENSE
4
I
OPU ground reference point for MONITOR measurement
V
5
SUP
analog ground 1
SSA1
I
6
O
reference current output (22 k resistor connected to analog ground)
REF
V
7
SUP
analog supply voltage 1
DDA1
V
8
I/O
servo reference voltage
REFO
D1
9
I
diode voltage/current input (central diode signal input)
D2
10
I
diode voltage/current input (central diode signal input)
D3
11
I
diode voltage/current input (central diode signal input)
D4
12
I
diode voltage/current input (central diode signal input)
R1
13
I
diode voltage/current input (satellite diode signal input)
R2
14
I
diode voltage/current input (satellite diode signal input)
CSLICE
15
I/O
22 nF capacitor for adaptive HF data slicer
V
16
SUP
analog supply voltage 2
DDA2
V
17
SUP
analog ground 2
SSA2
OSCOUT
18
O
crystal/resonator output
OSCIN
19
I
crystal/resonator input
V
20
SUP
analog ground 3
SSA3
DACGND
21
I
audio DAC ground
DACRP
22
O
audio DAC right channel differential positive output
DACRN
23
O
audio DAC right channel differential negative output
DACV
24
I/O
audio DAC decoupling point (10 F or 100 nF to ground
ref
DACLN
25
O
audio DAC left channel differential negative output
DACLP
26
O
audio DAC left channel differential positive output
DACV
27
I
audio DAC positive supply voltage
pos
BUFV
28
I
audio buffer positive supply voltage
pos
BUFINR
29
I
audio buffer right input
BUFOUTR
30
O
audio buffer right output
BUFOUTL
31
O
audio buffer left output
BUFINL
32
I
audio buffer left input
BUFGND
33
I
audio buffer ground
LKILL
34
O
KILL output for left channel (confi g urable as open-drain)
RKILL
35
O
KILL output for right channel (confi g urable as open-drain)
CDTRDY
36
O
CD text output to microcontroller ready fl a g
CDTDATA
37
O
CD text output data to microcontroller
CDTCLK
38
I
CD text microcontroller clock input
CFLAG
39
O
correction fl a g output (open-drain)
V
40
SUP
digital ground 1
SSD1
10-3
DESCRIPTION
SYMBOL
PIN
I/O
V
41
SUP
digital supply voltage 1
DDD1
SDI
42
I
serial data input (loopback)
WCLI
43
I
word clock input (loopback)
SCLI
44
I
serial bit clock input (loopback)
EF
45
O
C2 error fl a g output
DATA
46
O
serial data output
WCLK
47
O
word clock output
SCLK
48
O
serial clock output
CLK16
49
O
16 MHz clock output
CLK4/12
50
O
confi g urable 4 MHz or 12 MHz clock output
RESET
51
I
power-on reset input (active LOW)
SDA
52
I/O
microcontroller interface data input/output (open-drain)
SCL
53
I
microcontroller interface clock input
RAB
54
I
microcontroller interface R/W and load control input (4-wire)
SILD
55
I
microcontroller interface R/W and load control input (4-wire)
STATUS
56
O
servo interrupt request line/decoder status register/DC offset value
readback output
RCK
57
I
subcode clock input
SUB
58
O
P to W subcode output
SFSY
59
O
subcode frame sync output
SBSY
60
O
subcode block sync output
V
61
SUP
digital ground 2
SSD2
DOBM
62
O
bi-phase mark output (externally buffered)
V
63
SUP
digital supply voltage 2
DDD2
RA
64
O
radial actuator output
FO
65
O
focus actuator output
SL
66
O
sledge actuator output
MOTO1
67
O
motor output 1 output
MOTO2
68
O
motor output 2 output
V
69
SUP
digital ground 3
SSD3
V
70
SUP
digital supply voltage 3
DDD3
V1
71
I
versatile pin 1 input
V2
72
I
versatile pin 2 input
V3
73
O
versatile pin 3 output
V4
74
O
versatile pin 4 output
V5
75
O
versatile pin 5 output
TEST1
76
I
test pin 1 input
TEST2
77
I
test pin 2 input
TEST3
78
I
test pin 3 input
TEST4
79
I
test pin 4 input
LASER
80
O
laser drive output
10-3
DESCRIPTION
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