SAA2520 Datasheet, PDF (33/36 Pages) NXP Semiconductors – Stereo filter and codec for MPEG layer 1 audio applications

Philips Semiconductors
Stereo filter and codec for MPEG layer 1
audio applications
Preliminary specification
SAA2520
SYMBOL
PARAMETER
CONDITIONS MIN.
TYP.
MAX.
SBMCLK master mode (SBCL, SBWS and SBDA are output)
T_C
SBCL cycle time
T_C
SBCL cycle time
T_C
SBCL cycle time
T_C
SBCL cycle time
t_cH
SBCL HIGH time
t_cH
SBCL HIGH time
t_cH
SBCL HIGH time
t_cH
SBCL HIGH time
t_cL
SBCL LOW time
t_cL
SBCL LOW time
t_cL
SBCL LOW time
t_cL
SBCL LOW time
t_D1
SBWS, SBDA hold
t_D2
SBWS, SBDA valid
384 kB/s
−
8T
256 kB/s
−
12T
192 kB/s
−
16T
128 kB/s
−
24T
384 kB/s
4T − 20
−
256 kB/s
6T − 20
−
192 kB/s
8T − 20
−
128 kB/s
12T − 20 −
384 kB/s
4T − 20
−
256 kB/s
6T − 20
−
192 kB/s
8T − 20
−
128 kB/s
12T − 20 −
to SBCL LOW 20
−
after SBCL 0 −
−
SBMCLK slave mode (SBCL, SBWS and SBDA are input)
T_C
SBCL cycle time
t_cH
SBCL HIGH time
t_cL
SBCL LOW time
t_S1
SBWS, SBDA setup time
note 2
6.86T
8T
T + 30
−
T + 30
−
before SBCL T + 30
−
HIGH
t_H1
SBWS, SBDA hold time
after SBCL 30
−
HIGH
t_S2
delay before SBEF valid
after SBCL −
−
HIGH
t_H2
SBEF hold time
after SBCL 2T − 30
−
HIGH
−
−
−
−
−
−
−
−
−
−
−
−
−
20
96T
−
−
−
−
T − 30
−
Notes
1. % deviation from nominal frequency must be the same for X24, X22, and FS256 inputs to within 0.2%
2. Minimum value for bit rate = 448 kB/s
Typical value for bit rate = 384 kB/s
Maximum value for bit rate = 32 kB/s
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
August 1993
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