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AD9880: Can the I2C address by changed by SA0 pin?

I have a question about I2C address of AD9880. I find that the I2C address is
0x98 on page 10 of datasheet. But there is another description on page 56 of
datasheet. It seems like the I2C address can be changed by SA0 input pin, but I
can not find any explanation about SA0 pin.
So could you confirm that AD9880 only has one kind of I2C address. And kindly
tell me what the datasheet meaning is of:" address of the device (set by the
state of the SA0 input pin)" ?

 

The latest version AD9880 doesn’t support SA0 any more. AD9880 can only support
0x98 I2C address now.
.
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