Philips AZ 2558, Service Manual

Page: 13 / 51

4 - 3 4 - 3
Abbreviations and Pin-description of CD Ics
SERVO PROCESSOR SAA7325H
SYMBOL PIN DESCRIPTION
HFREF 1 comparator common mode input
HFIN 2 comparator signal input
ISLICE 3 current feedback output from data slicer
V
SSA1
4
(1)
analog ground 1
V
DDA1
5
(1)
analog supply voltage 1
I
ref
6 reference current output pin
V
RIN
7 reference voltage for servo ADC’s
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)
V
SSA2
14
(1)
analog ground 2
CROUT 15 crystal/resonator output
CRIN 16 crystal/resonator input
V
DDA2
17
(1)
analog supply voltage 2
LN 18 DAC left channel differential output - negative
LP 19 DAC left channel differential output - positive
V
neg
20 DAC negative reference input
V
pos
21 DAC positive reference input
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)
V
SSD1
33
(1)
digital ground 2
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
Abbreviations and Pin-description of CD Ics
SERVO PROCESSOR SAA7325H
SYMBOL PIN DESCRIPTION
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
V
SSD2
50
(1)
digital ground 3
DOBM 51 bi-phase mark output (externally buffered; 3-state)
V
DDD1(P)
52
(1)
digital supply voltage 2 for periphery
CFLG 53 correction flag output (open-drain)
RA 54 radial actuator output
FO 55 focus actuator output
SL 56 sledge control output
V
DDD2(C)
57
(1)
digital supply voltage 3 for core
V
SSD3
58
(1)
digital ground 4
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.
Abbreviations and Pin-description of CD ICs Abbreviations and Pin-description of CD ICs