Specifications
2000 Jun 26 8
Philips Semiconductors Product specification
Digital servo processor and Compact Disc
decoder with integrated DAC for video CD (CD7 II)
SAA7327
handbook, full pagewidth
SAA7327H
MGS249
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
SBSY
SFSY
SUB
RCK
TEST3
STATUS
SILD
RAB
SCL
SDA
SCLI
SDI
WCLI
V2/V3
V
SSD1
HFREF
HFIN
ISLICE
V
SSA1
V
DDA1
I
ref
V
RIN
D1
D2
D3
D4
R1
R2
V
SSA2
CROUT
CRIN 33
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
LDON
V1
V5
V4
MOTO2
MOTO1
V
SSD3
V
DDD2(C)
SL
FO
RA
CFLG
V
DDD1(P)
DOBM
V
SSD2
CL11/4
V
DDA2
LN
LP
V
neg
V
pos
RN
RP
SELPLL
TEST1
CL16
DATA
WCLK
SCLK
EF
TEST2
KILL 49
RESET
Fig.2 Pin configuration.
7 FUNCTIONAL DESCRIPTION
7.1 Decoder part
7.1.1 PRINCIPAL OPERATIONAL MODES OF THE DECODER
The decoding part supports a full audio specification and
can operate at two different disc speeds, from
single-speed (n = 1) to 2 times speed (n = 2). The factor
‘n’ is called the overspeed factor. A simplified data flow
through the decoder part is illustrated in Fig.7.
7.1.2 DECODING SPEED AND CRYSTAL FREQUENCY
The SAA7327 is a two speed decoding device, with an
internal Phase-Locked Loop (PLL) clock multiplier.
Depending on the crystal frequency used and the internal
clock settings (selectable via decoder register B), the
playback speeds shown in Table 1 are possible, where ‘n’
is the overspeed factor (1 or 2).
An internal clock multiplier is present, controlled by
SELPLL, and should only be used if a 8.4672 or
16.9344 MHz crystal, ceramic resonator or external clock
is present.
7.1.3 LOCK-TO-DISC MODE
For Electronic Shock Absorption (ESA) applications, the
SAA7327 can be put into lock-to-disc mode. This allows
Constant Angular Velocity (CAV) disc playback with