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DAC81416: 关于FSDO的疑问

Part Number: DAC81416


FSDO的定义如下:

Fast SDO bit (half-cycle speedup).

When 0, SDO updates during SCLK rising edges.

When 1, SDO updates during SCLK falling edges.

其读时序如下:

从时序图上看,FSDO = 0时,SDO的bit位在时钟下降沿有效,那么为什么定义中写的是上升沿呢 When 0, SDO updates during SCLK rising edges.