參數(shù)資料
型號(hào)： SAA7377
廠商： NXP Semiconductors N.V.
英文描述： Digital servo processor and Compact Disc decoder CD7
中文描述： 數(shù)字伺服處理器和CD7抗原光盤解碼器
文件頁(yè)數(shù)： 13/56頁(yè)
文件大?。?/td> 311K
代理商： SAA7377
1998 Jul 06
13
Philips Semiconductors
Product specifications
Digital servo processor and Compact Disc
decoder (CD7)
SAA7377
Table 2
Output flags
F1
F2
F3
F4
F5
F6
F7
F8
DESCRIPTION
0
1
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
0
0
1
1
x
x
x
x
x
x
x
x
x
x
x
x
0
1
0
1
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
0
0
0
0
1
1
x
x
x
x
x
x
x
x
x
x
0
0
1
1
0
1
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
0
0
1
1
x
x
x
x
x
x
x
x
x
x
x
x
0
1
0
1
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
7.6.2
C2FAIL
The C2FAIL pin indicates that invalid data has occurred on
the I
2
S-bus interface. However, due to the structure of the
corrector it is impossible to determine which byte has
failed. C2FAIL will go LOW for 140
μ
s when invalid data is
detected, this data may then occur 15 ms before or after
the pin is activated.
7.7
Audio functions
7.7.1
D
E
-
EMPHASIS AND PHASE LINEARITY
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
≤ ±
1
°
within the
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
D
IGITAL OVERSAMPLING FILTER
The SAA7377 contains a 2 to 4 times oversampling IIR
filter. The filter specification of the 4 times oversampling
filter is given in Table 3.
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
STOP BAND
24 kHz
24 to 27 kHz
27 to 35 kHz
35 to 64 kHz
64 to 68 kHz
68 kHz
69 to 88 kHz
ATTENUATION
≤
0.001 dB
≤
0.03 dB
≥
25 dB
≥
38 dB
≥
40 dB
≥
50 dB
≥
31 dB
≥
35 dB
≥
40 dB
0 to 9 kHz
19 to 20 kHz
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