SAA7371GP Philips Semiconductors, SAA7371GP Datasheet - Page 14

• Manufacturer Part Number: SAA7371GP
• Description: Digital servo processor and Compact Disc decoder CD7
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Table 2 Output flags
7.6.2
The C2FAIL pin indicates that invalid data has occurred on
the I
corrector it is impossible to determine which byte has
failed. C2FAIL will go LOW for (140/n) s when invalid
data is detected, this data may then occur (15/n) s before
or after the pin is activated.
7.7
7.7.1
When pre-emphasis is detected in the Q-channel
subcode, the digital filter automatically includes a
de-emphasis filter section. When de-emphasis is not
required, a phase compensation filter section controls the
phase of the digital oversampling filter to
band 0 to 16 kHz. With de-emphasis the filter is not phase
linear.
If the de-emphasis signal is set to be available at V5,
selected via register D, then the de-emphasis filter is
bypassed.
7.7.2
The SAA7371 contains a 2 to 4 times oversampling IIR
filter. The filter specification of the 4 times oversampling
filter is given in Table 3.
1998 Jul 06
F1
Digital servo processor and
Compact Disc decoder (CD7)
0
1
x
x
x
x
x
x
x
x
x
x
x
x
x
x
2
S-bus interface. However, due to the structure of the
Audio functions
F2
C2FAIL
D
D
0
0
1
1
x
x
x
x
x
x
x
x
x
x
x
x
E
IGITAL OVERSAMPLING FILTER
-
EMPHASIS AND PHASE LINEARITY
F3
x
x
0
1
0
1
x
x
x
x
x
x
x
x
x
x
F4
0
0
0
0
1
1
x
x
x
x
x
x
x
x
x
x
F5
x
x
x
x
x
x
0
0
1
1
0
1
x
x
x
x
F6
0
0
1
1
x
x
x
x
x
x
x
x
x
x
x
x
F7
x
x
x
x
x
x
x
x
x
x
x
x
0
1
0
1
1 within the
F8
x
x
x
x
x
x
0
1
0
1
0
1
x
x
x
x
no absolute time sync
absolute time sync
C1 frame contained no errors
C1 frame contained 1 error
C1 frame contained 2 errors
C1 frame uncorrectable
C2 frame contained no errors
C2 frame contained 1 error
C2 frame contained 2 errors
C2 frame contained 3 errors
C2 frame contained 4 errors
C2 frame uncorrectable
no interpolations
at least one 1-sample interpolation
at least one hold and no interpolations
at least one hold and one 1 sample interpolation
14
These attenuations do not include the sample-and-hold at
the external DAC output or the DAC post filter. When using
the oversampling filter, the output level is scaled 0.5 dB
down, to avoid overflow on full scale sine wave inputs
(0 to 20 kHz).
Table 3 Filter specification
PASS BAND
19 to 20 kHz
0 to 9 kHz
DESCRIPTION
STOP BAND
24 to 27 kHz
27 to 35 kHz
35 to 64 kHz
64 to 68 kHz
69 to 88 kHz
24 kHz
68 kHz
Product specification
ATTENUATION
SAA7371
0.001 dB
0.03 dB
25 dB
38 dB
40 dB
50 dB
31 dB
35 dB
40 dB