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DLPC3433 I2C读操作问题

Other Parts Discussed in Thread: DLPC3433

DLPC3433芯片,用软件模拟的IIC可以写数据,说明设备是好的,能建立通讯。

但是用IIC读数据的时候,试过好多也没有成功,读任何一个寄存器都是0xff。

请问3433的I2C有没有特殊的时序要求?

(我用这个模拟的IIC读写板子上另一个I2C设备是正常的)