saa7824 NXP Semiconductors, saa7824 Datasheet - Page 10

• Manufacturer Part Number: saa7824
• Description: Cd Audio Decoder, Digital Servo And Filterless Dac With Integrated Pre-amp And Laser Control Phonic
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7.2.4
The SAA7824 may be placed in two standby modes,
selected by decoder register B (it should be noted that the
device core is still active):
In the standby modes the various pins will have the
following values:
Table 2 External capacitor selection based upon the crystal type
2003 Oct 01
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 to 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)
Pins SCL and SDA: no interaction; normal operation
continues
Pins SCLK, WCLK, DATA, EF and DOBM: 3-state in
both standby modes; normal operation continues after
reset
Pins OSCIN, OSCOUT, CLK16 and CLK4/12: no
interaction; normal operation continues
Pins V1 to V5 and CFLAG: no interaction; normal
operation continues.
CD audio decoder, digital servo and filterless
DAC with integrated pre-amp and laser control
CAPACITANCE (C
CRYSTAL LOAD
S
TANDBY MODES
10 pF
20 pF
30 pF
L
)
CRYSTAL RESISTANCE
MAXIMUM SERIES
<300
<300
<300
8 MHz
(R
S
)
10
Table 1 Playback speeds
7.3
The crystal oscillator is a conventional 2-pin design which
can also operate with ceramic resonators. The external
components used around the crystal are illustrated in Fig.4
together with component values (C1 and C2) for a given
crystal type given in Table 2. Oscillator frequencies that is
used with the SAA7824 is 8.4672 MHz.
handbook, halfpage
REGISTER B
0XXX
1XXX
0XXX
Crystal oscillator
27 pF
47 pF
EXTERNAL LOAD CAPACITORS
8 pF
C1
SAA7824
Fig.4 Crystal configuration.
OSCIN
C1
REGISTER E
OSCILLATOR
0XXX
0XXX
1XXX
XTAL
OSCOUT
C2
Product specification
n = 2; voltage mode
n = 4; voltage mode
f
xtal
27 pF
47 pF
MBL439
8 pF
SAA7824
C2
= 8.4672 MHz
n = 1
only
only