SAA7335 Datasheet, PDF (14/36 Pages) NXP Semiconductors – DSP for CD and DVD-ROM systems

Philips Semiconductors
DSP for CD and DVD-ROM systems
Preliminary specification
SAA7335
Audio functions
CONCEALMENT
A 1-sample linear interpolator becomes active if a single
sample is flagged as erroneous but cannot be corrected.
The erroneous sample is replaced by a level midway
between the preceding and following samples. Left and
right channels have independent interpolators.
If more than one consecutive non-correctable sample is
found the last good sample is held. A 1-sample linear
interpolation is then performed before the next good
sample (see Fig.5).
DAC Interface
The SAA7335 is compatible with a wide range of ROM
block decoders and Digital-to-Analog Converters DACs.
The seven main formats that are supported are given in
Table 3.
Table 3 DAC interface formats (notes 1, 2 and 3)
MODE
1
2
3
4
5
6
7
BITS/WORD
16
16
24
24
32
32
variable
FORMAT
Philips I²S-bus
EIAJ
Philips I²S-bus
EIAJ
Philips I²S-bus
EIAJ
Philips I²S-bus
Notes
1. EIAJ is the abbreviation for Electronic Industries
Associated of Japan.
2. Number of BCLK periods per half WCLK period
(i.e. bits per sample).
3. Clock gating must be DISABLED for format mode 7.
handbook, _Bfu_Cll _Lpa_Kgewidth
DATA
D0 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 D15 D14
MISC
WCLK
flag-MSB (1 is unreliable)
left
flag-LSB
flag-MSB
right
SYNC
MGK245
Fig.6 Philips I²S-bus data format 1 (16-bit word length).
1997 Aug 11
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