topic no PST_CLK output in BDM mode in ColdFire/68K Microcontrollers and Processors https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/no-PST-CLK-output-in-BDM-mode/m-p/631808#M13095 <HTML><HEAD></HEAD><BODY><P>On my board, a MCF54415 is used in BDM mode. I am sure that JTAG_EN is low, RESET is high, Power is in the range of recommand value, clock is 50MHz, FB_CLK output in 62.5MHz. But no PST_CLK output and MCF54415 can't run in BDM mode with P&amp;E MULTILINK. What factor can influence PST_CLK? Some error in BOOTMODE or BOOT Config can lead to that?</P></BODY></HTML> Tue, 29 Nov 2016 03:44:48 GMT changliu1 2016-11-29T03:44:48Z no PST_CLK output in BDM mode https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/no-PST-CLK-output-in-BDM-mode/m-p/631808#M13095 <HTML><HEAD></HEAD><BODY><P>On my board, a MCF54415 is used in BDM mode. I am sure that JTAG_EN is low, RESET is high, Power is in the range of recommand value, clock is 50MHz, FB_CLK output in 62.5MHz. But no PST_CLK output and MCF54415 can't run in BDM mode with P&amp;E MULTILINK. What factor can influence PST_CLK? Some error in BOOTMODE or BOOT Config can lead to that?</P></BODY></HTML> Tue, 29 Nov 2016 03:44:48 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/no-PST-CLK-output-in-BDM-mode/m-p/631808#M13095 changliu1 2016-11-29T03:44:48Z Re: no PST_CLK output in BDM mode https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/no-PST-CLK-output-in-BDM-mode/m-p/631809#M13096 <HTML><HEAD></HEAD><BODY><P>The problem is solved.&nbsp; FlexBUS of MCF54415 is connected to a lattice CPLD and programn signal of CPLD is connected to resetout of MCF54415. When board power up, MCF54415 output a 20ms low on resetout signal, then all pins of CPLD is tied to ground. But at the same time, FB_AD9 output high low. So the actual voltage of FB_AD9 is only 1.2V. When resetout is high again, FB_AD9 and pins of CPLD recover to tri-state. But no PST_CLK output, and MCF54415 can not enter in BDM mode. After I disconnect the resetout of MCF54415 and programn pin of CPLD, everything is OK.</P></BODY></HTML> Fri, 02 Dec 2016 03:44:26 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/no-PST-CLK-output-in-BDM-mode/m-p/631809#M13096 changliu1 2016-12-02T03:44:26Z