SAA7324H NXP Semiconductors, SAA7324H Datasheet - Page 21

• Manufacturer Part Number: SAA7324H
• Manufacturer: NXP Semiconductors

Specifications of SAA7324H

• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
7.10
The KILL circuit detects digital silence by testing for an
all-zero or all-ones data word in the left or right channel
prior to the digital filter. The output is switched to active
LOW when silence has been detected for at least 270 ms,
or if mute is active, or in CD-ROM modes. Two modes are
available which can be selected by decoder register C:
1. Pin KILL: KILL active LOW indicates silence detected
2. Pin KILL: KILL active LOW indicates silence detected
It should be noted that when mute is active or in CD-ROM
modes the output(s) are switched LOW.
7.11
The audio features can be turned off (selected by decoder
register E) which affects the following functions:
Table 9 V2 or V3 configuration
Table 10 Pin applications
2000 Jun 26
PIN NAME
Digital filter, fade, peak detector, KILL circuit (but
outputs KILL, V3 still active) are disabled
V5 (if selected to be the de-emphasis flag output) and
the EBU outputs become undefined.
SHADEN
Digital servo processor and Compact Disc
decoder with integrated DAC (CD10 II)
on both left and right channels
on left channel. V3 active LOW indicates silence
detected on right channel.
V1
V2
V3
V4
V5
1
KILL circuit
Audio features off
ADDRESS
0011 (3H)
NUMBER
PIN
63
36
36
61
62
V2 or V3 pin
REGISTER
control of
output
output
output
TYPE
input
input
REGISTER
ADDRESS
DATA
0XXX
1XXX
1100
1100
1101
1101
V2/V3 pin configured as V2 input
V2/V3 pin configured as V3 output (open-drain)
REGISTER
21
DATA
XXX1
XXX0
XX0X
X01X
X11X
XX01
XX10
XX11
01XX
10XX
11XX
0000
It should be noted that the EBU output should be set LOW
prior to switching the audio features off and after switching
the audio features back on, a full-scale command should
be given.
7.12
The SAA7324 has four pins that can be reconfigured for
different applications. One of these pins, V2/V3, can be
programmed as an input (V2) or as an output (V3). Control
of the V2/V3 pin is via shadow register 3; see Table 9.
Selection of the V2/V3 pin does not affect the function
programmed by decoder register C i.e. the V2 or V3 pin
can be changed from V2/V3 function either before or after
setting the desired function via decoder register 1100.
Selection of, for instance, a V3 function while the V2/V3
pin is set to V2 will not affect the V2 functionality.
The functions of these versatile pins is identical to the
SAA737x series. The functions of these versatile pins is
programmed by decoder registers C and D, as shown in
Table 10.
The versatile pins interface
Q-to-W subcode output
output = 0
output = 1
de-emphasis output (active HIGH)
output = 0
output = 1
external off-track signal input
internal off-track signal used input may be read
via decoder status bit; selected via register 2
input may be read via decoder status bit;
selected via register 2
KILL output for right channel
output = 0
output = 1
4-line motor drive (using V4 and V5)
FUNCTION
FUNCTION
Product specification
SAA7324
RESET
reset