Table 257. Audio-Frequency Precision Using 48 Mhz Clock Derived From Hse - STMicroelectronics STM32WL5 Series Reference Manual

RM0453
Note: I2SDIV must be strictly higher than 1.
The following table provides example precision values for different clock configurations.
Note: Other configurations are possible that allow optimum clock precision.

Table 257. Audio-frequency precision using 48 MHz clock derived from HSE

SYSCLK
(MHz)
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
48
Serial peripheral interface / integrated interchip sound (SPI/I2S)
Data
I2SDIV I2SODD
length
16 8 0
32 4 0
16 15 1
32 8 0
16 17 0
32 8 1
16 23 1
32 11 1
16 34 0
32 17 0
16 47 0
32 23 1
16 68 0
32 34 0
16 94 0
32 47 0
16 2 0
32 2 0
16 2 0
32 2 0
16 3 0
32 3 0
16 4 1
32 4 1
16 6 0
32 6 0
16 8 1
32 8 1
16 11 1
32 11 1
RM0453 Rev 5
Target fs
MCLK
(Hz)
No 96000
No 96000
No 48000
No 48000
No 44100
No 44100
No 32000
No 32000
No 22050
No 22050
No 16000
No 16000
No 11025
No 11025
No 8000
No 8000
Yes 48000
Yes 48000
Yes 44100
Yes 44100
Yes 32000
Yes 32000
Yes 22050
Yes 22050
Yes 16000
Yes 16000
Yes 11025
Yes 11025
Yes 8000
Yes 8000
(1)
Real fs (kHz) Error
93750 2.3438%
93750 2.3438%
48387.0968 0.8065%
46875 2.3438%
44117.647 0.0400%
44117.647 0.0400%
31914.8936 0.2660%
32608.696 1.9022%
22058.8235 0.0400%
22058.8235 0.0400%
15957.4468 0.2660%
15957.447 0.2660%
11029.4118 0.0400%
11029.412 0.0400%
7978.7234 0.2660%
7978.7234 0.2660%
46875 2.3430%
46875 2.3430%
46875 6.2925%
46875 6.2925%
31250 2.3438%
31250 2.3438%
20833.333 5.5178%
20833.333 5.5178%
15625 2.3438%
15625 2.3438%
11029.4118 0.0400%
11029.4118 0.0400%
8152.17391 1.9022%
8152.17391 1.9022%
1293/1450
1311