sta003t STMicroelectronics, sta003t Datasheet - Page 19

• Manufacturer Part Number: sta003t
• Description: Mpeg 2.5 Layer Iii Audio Decoder
• Manufacturer: STMicroelectronics

The Oversampling Factor (O_FAC) is related to OCLK and SCKT by the following expression:
1) OCLK_freq = O_FAC * LRCKT_ Freq
2) OCLK_ Freq = 2 * (1+PCMDIVIDER) * 32*
3) OCLK_ Freq = 2 * (1+PCMDIVIDER) * 64*
4) PCMDIVIDER = (O_FAC/64) - 1 in 16 bit mode
5) PCMDIVIDER = (O_FAC/128) - 1 in 32 bit mode
Example for setting:
for 16 bit PCM Mode
O_FAC = 512 ; PCMDIVIDER = 7
O_FAC = 256 ; PCMDIVIDER = 3
O_FAC = 384 ; PCMDIVIDER = 5
MSB
(DAC relation)
LRCKT_Freq (when 16 bit PCM mode is used)
LRCKT_Freq (when 32 bit PCM mode is used)
PD7
b7
0
0
0
0
0
0
PD6
b6
0
0
0
0
0
0
PD5
b5
0
0
0
0
0
0
PD4
b4
0
0
0
0
0
0
PD3
b3
0
0
0
0
0
0
PD2
b2
1
1
0
0
0
0
for 32 bit PCM Mode
O_FAC = 512 ; PCMDIVIDER = 3
O_FAC = 256 ; PCMDIVIDER = 1
O_FAC = 384 ; PCMDIVIDER = 2
PD1
b1
1
0
1
1
1
0
LSB
PD0
b0
1
1
1
1
0
1
16 bit mode
16 bit mode
16 bit mode
32 bit mode
32 bit mode
32 bit mode
Description
512 x Fs
384 x Fs
256 x Fs
512 x Fs
384 x Fs
256 x Fs
STA003T
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