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你好,我现在使用88E1111作为TMS320C6455BCTZA的外部以太网PHY,但是TMS320C6455BCTZA的GMII接口为3.3V,而88E1111的GMII为2.5V,所以我选用了SN74AVCH16T245GR转换88E1111和TMS320C6455BCTZA的GMII接口。
SN74AVCH16T245GR的VCCA端接3.3V电源与TMS320C6455BCTZA相连。
SN74AVCH16T245GR的VCCB端接2.5V电源与88E1111相连。
GMII的数据以及收发时钟(125MHz)都是通过SN74AVCH16T245GR进行电平转换.
SN74AVCH16T245GR的数据手册上的1.8V到3.3V的最大转换速率为380Mhz,我想确认在VCCA接3.3V,VCCB接2.5V的情况下,SN74AVCH16T245GR的A端到B端,B端到A端是否都支持通过125MHz的时钟和数据信号