saa7327 NXP Semiconductors, saa7327 Datasheet - Page 9

• Manufacturer Part Number: saa7327
• Description: Digital Servo Processor And Compact Disc Decoder With Integrated Dac For Video Cd Cd7 Ii
• Manufacturer: NXP Semiconductors

Philips Semiconductors
varying input data rates from the inside-to-outside of the
disc.
In the lock-to-disc mode, the FIFO is blocked and the
decoder will adjust its output data rate to the disc speed.
Hence, the frequency of the I
clocks are dependent on the disc speed. In the lock-to-disc
mode there is a limit on the maximum variation in disc
speed that the SAA7327 will follow. Disc speeds must
always be within 25% to 100% range of their nominal
value. The lock-to-disc mode is enabled/disabled by
decoder register E.
7.1.4
The SAA7327 may be placed in two standby modes
selected by decoder register B (it should be noted that the
device core is still active):
Table 1 Playback speeds
Notes
1. The CL11 output is always a 5.6448 MHz clock if a 16.9344 MHz external clock is used and SELPLL = 0. CL11 is
2. Data capture performance is not optimized for this option.
2000 Jun 26
Digital servo processor and Compact Disc
decoder with integrated DAC for video CD (CD7 II)
REGISTER B
available on the CL11/4 output, enabled by programming shadow register 3 (see Section 7.15.3).
00XX
00XX
01XX
01XX
10XX
10XX
11XX
11XX
S
TANDBY MODES
SELPLL
2
0
1
0
1
0
1
0
1
S-bus (WCLK and SCLK)
33.8688
n = 1
n = 2
CRYSTAL FREQUENCY (MHz)
9
In the standby modes the various pins will have the
following values:
Standby 1: ‘CD-STOP’ mode; most I/O functions are
switched off
Standby 2: ‘CD-PAUSE’ mode; audio output features
are switched off, but the motor loop, the motor output
and the subcode interfaces remain active; this is also
called a ‘Hot Pause’.
MOTO1 and MOTO2: put in high-impedance, PWM
mode (standby 1 and reset: operating in standby 2); put
in high-impedance, PDM mode (standby 1 and reset:
operating in standby 2)
SCL and SDA: no interaction; normal operation
continues
SCLK, WCLK, DATA, EF and DOBM: 3-state in both
standby modes; normal operation continues after reset
CRIN, CROUT, CL16 and CL11/4: no interaction;
normal operation continues
V1, V2/V3, V4, V5 and CFLG: no interaction; normal
operation continues.
16.9344
n = 2
n = 1
n = 1
n = 2
(2)
8.4672
n = 1
n = 2
Product specification
SAA7327
FREQUENCY
(MHz)
11.2896
11.2896
11.2896
11.2896
11.2896
11.2896
5.6448
5.6448
CL11
(1)