T-Series中的主题 T2080 CGA_PLL1_RAT https://community.nxp.com/t5/T-Series/T2080-CGA-PLL1-RAT/m-p/1072184#M3697 <HTML><HEAD></HEAD><BODY><P>We are running SYSCLK at 100MHz. We are using PLL1 to drive the FMAN. We use Processor Expert to create the RCW. In the past I have been able to set CGA_PLL1_RAT to 7:1. But now it appears I cannot set it lower than 8:1. Did PE change to limit the value? The reference manual states 5:1 is allowed, but states look elsewhere (datasheet is assumed) to determine limitations.</P><P>In the datasheet, Table 121 discusses PLL frequencies. I may have missed the limitation there in the past as I assume it was for the Core frequency, does that require the CGA_PLL1 and CGA_PLL2 to meet a minimum of 1000MHz?&nbsp;</P></BODY></HTML> Thu, 06 Aug 2020 16:50:57 GMT scottgerhold 2020-08-06T16:50:57Z T2080 CGA_PLL1_RAT https://community.nxp.com/t5/T-Series/T2080-CGA-PLL1-RAT/m-p/1072184#M3697 <HTML><HEAD></HEAD><BODY><P>We are running SYSCLK at 100MHz. We are using PLL1 to drive the FMAN. We use Processor Expert to create the RCW. In the past I have been able to set CGA_PLL1_RAT to 7:1. But now it appears I cannot set it lower than 8:1. Did PE change to limit the value? The reference manual states 5:1 is allowed, but states look elsewhere (datasheet is assumed) to determine limitations.</P><P>In the datasheet, Table 121 discusses PLL frequencies. I may have missed the limitation there in the past as I assume it was for the Core frequency, does that require the CGA_PLL1 and CGA_PLL2 to meet a minimum of 1000MHz?&nbsp;</P></BODY></HTML> Thu, 06 Aug 2020 16:50:57 GMT https://community.nxp.com/t5/T-Series/T2080-CGA-PLL1-RAT/m-p/1072184#M3697 scottgerhold 2020-08-06T16:50:57Z Re: T2080 CGA_PLL1_RAT https://community.nxp.com/t5/T-Series/T2080-CGA-PLL1-RAT/m-p/1072185#M3698 <HTML><HEAD></HEAD><BODY><P>&gt; does that require the CGA_PLL1 and CGA_PLL2 to meet a minimum of 1000MHz?&nbsp;</P><P>Yes.</P><P>The Data Sheet requirements must be fulfilled - else normal processor operation is not guaranteed.</P></BODY></HTML> Fri, 07 Aug 2020 02:40:23 GMT https://community.nxp.com/t5/T-Series/T2080-CGA-PLL1-RAT/m-p/1072185#M3698 ufedor 2020-08-07T02:40:23Z