STA30813TR STMicroelectronics, STA30813TR Datasheet - Page 11

• Manufacturer Part Number: STA30813TR
• Description: IC PROCESSOR AUD DGTL DDX 64TQFP
• Manufacturer: STMicroelectronics
• Series: DDX™r
• Type: Audio Processorr

Specifications of STA30813TR

• Mounting Type: Surface Mount
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Other names: 497-3946-2

3.0 CONFIGURATION REGISTER A (ADDRESS 00H)
3.0.1 Master Clock Select
The STA308 will support sample rates of 32kHz, 44.1kHz, 48Khz, 88.2kHz, 96kHz, 176.4kHz, and 192kHz.
Therefore the internal clock will be:
The external clock frequency provided to the XTI pin must be a multiple of the input sample frequency(fs). The
relationship between the input clock and the input sample rate is determined by both the MCSx and the IRx (In-
put Rate) register bits. The MCSx bits determine the PLL factor generating the internal clock and the IRx bits
determine the oversampling ratio used internally.
3.0.2 Interpolation Ratio Select
The STA308 has variable interpolation (oversampling) settings such that internal processing and DDX output
rates remain consistent. The first processing block interpolates by either 4 times, 2 times, or 1 time (pass-
through). The IR bits determine the oversampling ratio of this interpolation.
Table 2. IR bit settings as a function of Input Sample Rate.
BIT
BIT
– 65.536Mhz for 32kHz
– 90.3168Mhz for 44.1khz, 88.2kHz, and 176.4kHz
– 98.304Mhz for 48kHz, 96kHz, and 192kHz
3
4
0
1
2
NAME
RST
BIT
Input Sample Rate
R/W
R/W
R/W
Input Sample Rate Fs
32, 44.1, 48
R/W
R/W
R/W
R/W
176.4, 192
fs (kHz)
88.2, 96
176.4kHz
44.1kHz
88.2kHz
192kHz
RST
32kHz
48kHz
96kHz
0
0
MPC
D7
1
RST
1
1
0
NAME
IR0
IR1
HPE
D6
0
Interpolation Ratio Select : Selects internal interpolation ratio based on input I
sample frequency
NAME
MCS0
MCS1
MCS2
00
01
10
IR
BME
D5
0
IR(1,0)
00
00
00
01
01
10
10
128fs
64fs
64fs
1xx
IR1
Master Clock Select : Selects the ratio between the input I
sample frequency and the input clock.
D4
0
IR0
D3
256fs
128fs
128fs
0
011
DESCRIPTION
1
st
Stage Interpolation Ratio
MCS(2..0)
4 times oversampling
4 times oversampling
4 times oversampling
2 times oversampling
2 times oversampling
MCS2
DESCRIPTION
D2
0
384fs
192fs
192fs
Pass-Through
Pass-Through
010
MCS1
256fs
256fs
512fs
D1
001
1
STA308
MCS0
768fs
384fs
384fs
000
D0
1
11/33
2
2
S
S