topic ADC Clock in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/ADC-Clock/m-p/331407#M15528 <HTML><HEAD></HEAD><BODY><P>I'm a little puzzled on one thing about the ADC clock.&nbsp; According to the KE06 data sheet, the conversion clock has to be between 0.4 and 8 MHz for high speed mode.&nbsp; If I'm using a 24 MHz bus clock, then I must use bus clock/2 as the source, and divide that by 2 to get to 6 MHz.&nbsp; What if I divide that by 4 to get 3 MHz?&nbsp; Does it just mean that conversions take longer?</P></BODY></HTML> Sun, 03 Aug 2014 03:06:29 GMT dsherman 2014-08-03T03:06:29Z ADC Clock https://community.nxp.com/t5/Kinetis-Microcontrollers/ADC-Clock/m-p/331407#M15528 <HTML><HEAD></HEAD><BODY><P>I'm a little puzzled on one thing about the ADC clock.&nbsp; According to the KE06 data sheet, the conversion clock has to be between 0.4 and 8 MHz for high speed mode.&nbsp; If I'm using a 24 MHz bus clock, then I must use bus clock/2 as the source, and divide that by 2 to get to 6 MHz.&nbsp; What if I divide that by 4 to get 3 MHz?&nbsp; Does it just mean that conversions take longer?</P></BODY></HTML> Sun, 03 Aug 2014 03:06:29 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/ADC-Clock/m-p/331407#M15528 dsherman 2014-08-03T03:06:29Z Re: ADC Clock https://community.nxp.com/t5/Kinetis-Microcontrollers/ADC-Clock/m-p/331408#M15529 <HTML><HEAD></HEAD><BODY><P>Hi:</P><P></P><P>Yes, normally slower ADC clock will take longer time to finish conversions.</P><P></P><P>24.4.4.5 Sample time and total conversion time</P><P>The total conversion time depends on the sample time (as determined by</P><P>ADC_SC3[ADLSMP]), the MCU bus frequency, the conversion mode (8-bit, 10-bit or</P><P>12-bit), and the frequency of the conversion clock (fADCK).</P><P></P><P>Dawei You（尤大为）</P><P>Mobile: +86 13675169919</P></BODY></HTML> Sun, 03 Aug 2014 14:10:07 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/ADC-Clock/m-p/331408#M15529 daweiyou 2014-08-03T14:10:07Z