BU26154MUV_15 Datasheet, PDF (18/90 Pages) Rohm – Monaural Audio CODEC with Touch Panel Interface

BU26154MUV
Datasheet
When PLL is not Used.
Audio clock is generated by the CPU and supplied to the LSI when PLL is not used. Then CPU and the LSI are
synchronized.
■case 5: MST (0x64/0x65) ="0"
Audio clock (256fs, 512fs, 1024fs) is generated by the CPU and supplied to MCLKI port of the LSI. LRCLK and BCLK are
also provided from the CPU.
Figure 16
■case6: MST (0x64/0x65)="1"
Audio clock (256fs, 512fs, 1024fs) is generated by the CPU and supplied to MCLKI port of the LSI. SAI_LRCLK and
SAI_BCLK are provided from the LSI.
Figure 17
Even when using the same sampling frequency, the setting condition is different depending on clock frequency.
When changing MCLKI input frequency, PLLOE should be set to “0”, then PLLOE should be set to “1” back.
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26.Oct.2015 Rev.002