4 -2
4 -2
CD audio decoder, digital servo & filterless DAC
with integrated pre-amp & laser control
SAA7824
SYMBOL
PIN
DESCRIPTION
LPOWER
1
Laser power supply
EXTFILTER
2
10 nF capacitor for Laser start-up control
MONITOR
3
Laser monitor diode
SENSE
4
OPU ground reference point for MONITOR measurement
V
SSA1
5
Analogue ground 1
IREF
6
Reference current pin (24K
Ω
resister to analogue ground)
V
DDA1
7
Analogue supply voltage 1
VREF_OUT
8
Servo reference voltage
D1
9
Diode voltage/current input (central diode signal input)
D2
10
Diode voltage/current input (central diode signal input)
D3
11
Diode voltage/current input (central diode signal input)
D4
12
Diode voltage/current input (central diode signal input)
R1
13
Diode voltage/current input (satellite diode signal input)
R2
14
Diode voltage/current input (satellite diode signal input)
CSLICE
15
10nF capacitor for adaptive HF dataslicer
V
DDA2
16
Analogue supply voltage 2
V
SSA2
17
Analogue ground 2
OSCOUT
18
Crystal/resonator output
OSCIN
19
Crystal/resonator input
V
SSA3
20
Analogue ground 3
DAC_GND
21
Audio DAC ground
DAC_RP
22
Audio DAC right channel differential output (positive)
DAC_RN
23
Audio DAC right channel differential output (negative)
DAC_VREF
24
Audio DAC decoupling point (10uF//100nF to ground)
DAC_LN
25
Audio DAC left channel differential output (negative)
DAC_LP
26
Audio DAC left channel differential output (positive)
DAC_VPOS
27
Audio DAC positive supply
BUF_VPOS
28
Audio buffer positive supply
BUF_IN_R
29
Audio buffer right input
BUF_OUT_R
30
Audio buffer right output
BUF_OUT_L
31
Audio buffer left output
BUF_IN_L
32
Audio buffer left input
BUF_GND
33
Audio buffer ground
LKILL
34
Kill output for left channel (configurable as open drain)
RKILL
35
Kill output for right channel (configurable as open drain)
CDT_RDY
36
CD-Text to micro ready flag
CDT_DATA
37
CD-Text data to micro
CDT_CLK
38
CD-Text micro clock
CFLAG
39
Correction flag output (open drain)
V
SSD1
40
Digital ground 1
V
DDD1
41
Digital supply voltage 1
SDI
42
Serial data input (loopback)
WCLI
43
Word clock input (loopback)
PIN DESCRIPTIN OF INTEGRATED CIRCUIT
SCLI
44
Serial bit clock (loopback)
EF
45
C2 error flag
DATA
46
Serial data output
WCLK
47
Word clock output
SCLK
48
Serial clock output
CLK16
49
16MHz clock
CLK4_12
50
Configurable 4MHz or 12MHz clock
RESET
51
Power on reset (active low)
SDA
52
Micro interface data I/O line (open drain output)
SCL
53
Micro interface clock line
RAB
54
Micro interface R/W & load control line (4-wire)
SILD
55
Micro interface R/W & load control line (4-wire)
STATUS
56
Servo interrupt request line/decoder status register/DC offset value readback
RCK
57
Subcode clock
SUB
58
P to W subcode
SFSY
59
Subcode frame sync
SBSY
60
Subcode block sync
V
SSD2
61
Digital ground 2
DOBM
62
Bi-phase mark output (externally buffered)
V
DDD2
63
Digital supply voltage 2
RA
64
Radial actuator
FO
65
Focus actuator
SL
66
Sledge actuator
MOTO1
67
Motor output 1
MOTO2
68
Motor output 2
V
SSD3
69
Digital ground 3
V
DDD3
70
Digital supply voltage 3
V1
71
Versatile pin 1
V2
72
Versatile pin 2
V3
73
Versatile pin 3
V4
74
Versatile pin 4
V5
75
Versatile pin 5
TEST1
76
Test pin
TEST2
77
Test pin
TEST3
78
Test pin
TEST4
79
Test pin
LASER
80
Laser drive
SYMBOL
PIN
DESCRIPTION
