SAA7374GP PHILIPS [NXP Semiconductors], SAA7374GP Datasheet - Page 19

• Manufacturer Part Number: SAA7374GP
• Description: Low voltage digital servo processor and Compact Disc decoder CD7LV
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
Table 7 Bit assignment
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
before the digital filter. The output is switched active LOW
when silence has been detected for at least 250 ms, or if
mute is active, or in CD-ROM modes. Two modes are
available which can be selected by register C
It should be noted that when mute is active or in CD-ROM
modes the output(s) are switched LOW.
1998 Feb 26
Control
Reserved mode
Category code
Clock accuracy
Remaining
1 pin kill: KILL active LOW indicates silence detected on
both left and right channels.
2 pin kill: KILL active LOW indicates silence detected on
left channel. V3 active LOW indicates silence detected
on right channel.
Low voltage digital servo processor and
Compact Disc decoder (CD7LV)
FUNCTION
KILL circuit
16 to 27 and
30 to 191
28 to 29
8 to 15
0 to 3
4 to 7
BITS
copy of CRC checked Q-channel control bits 0 to 3; bit 2 is logic 1 when copy
permitted; bit 3 is logic 1 when recording has pre-emphasis
always zero
CD: bit 8 = logic 1, all other bits = logic 0
set by register A; 10 = level I; 00 = level II; 01 = level III
always zero
19
7.11
The audio features can be turned off (selected by register
E) which affects the following functions;
It should be noted that the EBU output should be set LOW
prior to switching the audio features off and after switching
audio features back on a full-scale command should be
given.
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.
Audio features off
DESCRIPTION
Product specification
SAA7374