SAA7327H/T/M2B,557 NXP Semiconductors, SAA7327H/T/M2B,557 Datasheet - Page 24

• Manufacturer Part Number: SAA7327H/T/M2B,557
• Description: IC DIGITAL/CD DAC DECODER 64QFP
• Manufacturer: NXP Semiconductors
• Type: Audio Decoderr

Specifications of SAA7327H/T/M2B,557

• Voltage - Supply, Digital: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Voltage - Supply, Analog: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 935268128557; SAA7327HBG; SAA7327HBG

Philips Semiconductors
7.13.1.4
In the CDV motor mode, the FIFO position will be put in
pulse-width modulated form on the MOTO1 pin [carrier
frequency (300
The PLL frequency signal will be put in pulse-density
modulated form (carrier frequency 4.23
MOTO2 pin. The integrated motor servo is disabled in this
mode.
The PWM signal on MOTO1 corresponds to a total
memory space of 20 frames, therefore the nominal FIFO
position (half full) will result in a PWM output of 60%.
In the lock to-disc (CAV) mode the CDV motor mode is the
only mode that can be used to control the motor.
7.13.2
The operation modes of the motor servo is controlled by
decoder register 1 (see Table 11).
In the SAA7327 decoder there is an anti-windup mode for
the motor servo, selected via decoder register 1. When the
anti-wind-up mode is activated the motor servo integrator
will hold if the motor output saturates.
2000 Jun 26
Digital servo processor and Compact Disc
decoder with integrated DAC for video CD (CD7 II)
S
PINDLE MOTOR OPERATING MODES
CDV/CAV output mode
d) Hz], where ‘d’ is the disc speed factor.
MOTO1
V4
Fig.18 Motor 4-line PWM mode application diagram.
n MHz) on the
10
V SS
24
M
+
7.13.2.1
In start mode 1, start mode 2, stop mode 1 and stop
mode 2, a fixed positive or negative voltage is applied to
the motor. This voltage can be programmed as a
percentage of the maximum possible voltage, via
register 6, to limit current drain during start and stop.
The following power limits are possible; 100% (no power
limit), 75%, 50%, or 37% of maximum.
7.13.3
The gain and crossover frequencies of the motor control
loop can be programmed via decoder registers 4 and 5.
The following parameter values are possible:
It should be noted that the crossover frequencies f
are scaled with the overspeed factor ‘n’ whereas the gains
are not.
Gains: 3.2, 4.0, 6.4, 8.0, 12.8, 16, 25.6 and 32
Crossover frequency f
1.4
Crossover frequency f
3.42
100 nF
n Hz and 2.8
L
n Hz.
OOP CHARACTERISTICS
Power limit
MGA364 - 2
n Hz
MOTO2
V5
4
3
: 0.5
: 0.85
n Hz, 0.7
n Hz, 1.71
Product specification
SAA7327
n Hz,
n Hz and
3
and f
4