SAA7348GP Datasheet, PDF (12/60 Pages) NXP Semiconductors – All Compact Disc Engine ACE

Philips Semiconductors
All Compact Disc Engine (ACE)
Preliminary specification
SAA7348GP
• Motor control; the spindle motor is controlled by a fully
integrated digital servo. Address information from the
internal 8 frame FIFO and disc speed information are
used to calculate the motor control output signals.
Several output modes are supported:
– Pulse density, 2-line (true complement output),
1 × n MHz sample frequency
– PWM-output, 2-line, 22.05 × n kHz modulation
frequency
– CDV motor mode
– Brushless motor control mode.
A simplified illustration of the data flow through the
decoder is shown in Fig.4.
Table 2 Decoder playback speeds; note 1
REGISTER B
00XX
00XX
01XX
01XX
10XX
10XX
11XX
REGISTER E
0XXX
1XXX
0XXX
1XXX
0XXX
1XXX
0XXX
67.7376⁽²⁾
n=2
n=8
−
−
n=4
n = 16
−
INTERNAL FREQUENCY (MHz)
50.8032⁽²⁾
33.8688⁽²⁾⁽³⁾
n = 1.5
n=1
n=6
−
−
n=3
n = 12
−
n=4
−
−
n=2
n=8
−
16.9344⁽⁴⁾
−
n=2
n=1
n=4
−
−
n=2
Notes
1. X = don’t care.
2. With an 8.4672 MHz crystal, and only if SELPLL = 1 (i.e. clock multiplier enabled; see also Section 8.1.1).
3. Can use external 33.8688 MHz crystal.
4. Can use external 16.9344 MHz crystal.
1997 Jul 11
12