Kinetis MicrocontrollersのトピックVREFH is tied to VDDA ? https://community.nxp.com/t5/Kinetis-Microcontrollers/VREFH-is-tied-to-VDDA/m-p/654087#M39909 <HTML><HEAD></HEAD><BODY><P><SPAN style="font-size: 12.0pt; color: black;">&nbsp;</SPAN></P><P><SPAN style="font-size: 12.0pt; color: black;">For the mk64fn1m0Vdc12 device, can you confirm if the VREFH is tied to VDDA in the 121 XBGA package? The datasheet ball out lists VREFH as a pin, so it implies it is not shorted to VDDA. Can you confirm?</SPAN></P><P><SPAN style="font-size: 12.0pt; color: black;">&nbsp;</SPAN></P><P><SPAN style="font-size: 12.0pt; color: black;">Can I generally say if VDDA and VREFH are pinned out they are not connected internally. If I recall they are connected internally only on lower pin count parts.</SPAN></P></BODY></HTML> Tue, 06 Dec 2016 16:15:16 GMT dkh 2016-12-06T16:15:16Z VREFH is tied to VDDA ? https://community.nxp.com/t5/Kinetis-Microcontrollers/VREFH-is-tied-to-VDDA/m-p/654087#M39909 <HTML><HEAD></HEAD><BODY><P><SPAN style="font-size: 12.0pt; color: black;">&nbsp;</SPAN></P><P><SPAN style="font-size: 12.0pt; color: black;">For the mk64fn1m0Vdc12 device, can you confirm if the VREFH is tied to VDDA in the 121 XBGA package? The datasheet ball out lists VREFH as a pin, so it implies it is not shorted to VDDA. Can you confirm?</SPAN></P><P><SPAN style="font-size: 12.0pt; color: black;">&nbsp;</SPAN></P><P><SPAN style="font-size: 12.0pt; color: black;">Can I generally say if VDDA and VREFH are pinned out they are not connected internally. If I recall they are connected internally only on lower pin count parts.</SPAN></P></BODY></HTML> Tue, 06 Dec 2016 16:15:16 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/VREFH-is-tied-to-VDDA/m-p/654087#M39909 dkh 2016-12-06T16:15:16Z Re: VREFH is tied to VDDA ? https://community.nxp.com/t5/Kinetis-Microcontrollers/VREFH-is-tied-to-VDDA/m-p/654088#M39910 <HTML><HEAD></HEAD><BODY><P style="margin: 0in 0in 0pt;"><SPAN style="color: #1f497d; font-size: medium; font-family: Calibri;">If VREFH/VDDA are pinned out to a separate ball, then they would be separate. They are never tied together internally, they could be tied together in the package but that is generally only done for the 32-pin and smaller size packages.</SPAN></P></BODY></HTML> Tue, 06 Dec 2016 22:49:07 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/VREFH-is-tied-to-VDDA/m-p/654088#M39910 juan_mendoza 2016-12-06T22:49:07Z