Philips AZ 2558 Service Manual page 13

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)
V 4 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)
33
V 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
V digital ground 3
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)
V 58 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