https://community.nxp.com/t5/PowerQUICC-Processors/I2C-Problem/m-p/647168#M1962 <HTML><HEAD></HEAD><BODY><P>Please explain how the issue is related with a PowerQUICC processor.</P></BODY></HTML> Sat, 31 Dec 2016 04:37:15 GMT ufedor 2016-12-31T04:37:15Z https://community.nxp.com/t5/PowerQUICC-Processors/I2C-Problem/m-p/647167#M1961 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P>We design a Backplane system with&nbsp;PCA9548A I2C switch, &nbsp;In this design, the <A href="mailto:I@C">I</A>2C switch multiplex <A href="mailto:I@C">I</A>2C between cards. when write 0x00 in register 0 of&nbsp;PCA9548A, and output I2C ports are disable, the I2C signal is OK!</P><P>But when wite 0xff in resister 0 of&nbsp;PCA9548A, and output I2C ports are enable, the I2C signal is not OK because the low level of the signal come to 0.7 volt. What can I do to overcome this problem?</P><P>I attach I2C signal Image, whan all ports are enable and all ports are disable.</P><P>thanks</P></BODY></HTML> Thu, 29 Dec 2016 06:27:39 GMT https://community.nxp.com/t5/PowerQUICC-Processors/I2C-Problem/m-p/647167#M1961 mohsenhaghighat 2016-12-29T06:27:39Z https://community.nxp.com/t5/PowerQUICC-Processors/I2C-Problem/m-p/647168#M1962 <HTML><HEAD></HEAD><BODY><P>Please explain how the issue is related with a PowerQUICC processor.</P></BODY></HTML> Sat, 31 Dec 2016 04:37:15 GMT https://community.nxp.com/t5/PowerQUICC-Processors/I2C-Problem/m-p/647168#M1962 ufedor 2016-12-31T04:37:15Z