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TAS2557: Checksum and I2S CLK question

Part Number: TAS2557

Hello.

Our customer survey TAS2557 have two question need your help.

1. How can I confirm the register write to chip is correct. For example : Write register address 0x00 to 01 then get acknowledge from chip. But read 0x00 is not 01. Can I use TAS2557 checksum?

2. If I2S input CLK(MCLK/SCLK/WCLK) sudden unstable or jitter is to big. Is there any way to know from TAS2557?