topic LPC55S69 : pin repeater mode in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/LPC55S69-pin-repeater-mode/m-p/1001642#M39335 <HTML><HEAD></HEAD><BODY><P>Hi !</P><P></P><P>Do I indestand right and pin repeater mode is need to keep output pin state while some low power modes ?</P><P></P><P>"</P><P>The repeater mode enables the pull-up resistor if the pin is high and enables the<BR />pull-down resistor if the pin is low. This causes the pin to retain its last known state if it is<BR />configured as an input and is not driven externally. Such state retention is not applicable to<BR />the deep power-down mode. Repeater mode may typically be used to prevent a pin from<BR />floating and potentially using significant power if it floats to an indeterminate state if it is<BR />temporarily not driven.</P><P>"</P><P>I can see while Powerdown mode, DIR register "lose" direction and all pins reconfigured as inputs.</P><P>I can backup/restore this register. But what other registers need to be backup restored for return back output pin state 0/1 , PIN ?</P><P></P><P>Regards,</P><P>Eugene</P></BODY></HTML> Sat, 25 Jan 2020 19:43:58 GMT EugeneHiihtaja 2020-01-25T19:43:58Z LPC55S69 : pin repeater mode https://community.nxp.com/t5/LPC-Microcontrollers/LPC55S69-pin-repeater-mode/m-p/1001642#M39335 <HTML><HEAD></HEAD><BODY><P>Hi !</P><P></P><P>Do I indestand right and pin repeater mode is need to keep output pin state while some low power modes ?</P><P></P><P>"</P><P>The repeater mode enables the pull-up resistor if the pin is high and enables the<BR />pull-down resistor if the pin is low. This causes the pin to retain its last known state if it is<BR />configured as an input and is not driven externally. Such state retention is not applicable to<BR />the deep power-down mode. Repeater mode may typically be used to prevent a pin from<BR />floating and potentially using significant power if it floats to an indeterminate state if it is<BR />temporarily not driven.</P><P>"</P><P>I can see while Powerdown mode, DIR register "lose" direction and all pins reconfigured as inputs.</P><P>I can backup/restore this register. But what other registers need to be backup restored for return back output pin state 0/1 , PIN ?</P><P></P><P>Regards,</P><P>Eugene</P></BODY></HTML> Sat, 25 Jan 2020 19:43:58 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC55S69-pin-repeater-mode/m-p/1001642#M39335 EugeneHiihtaja 2020-01-25T19:43:58Z