8-bit Microcontrollersのトピックexit from power down mode https://community.nxp.com/t5/8-bit-Microcontrollers/exit-from-power-down-mode/m-p/624393#M22239 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Using P89V51RB2 and DS1337 Real Time Clock chip.&nbsp; Am able to program DS1337 with date/time and set alarm. Put P89V51RB2 into power down mode and set to wake up on active low INT0.&nbsp; The DS1337 lowers the INT0 line as programmed when alarm time reached but the P89V51RB2 does not exit power-down.&nbsp;&nbsp; If I lower INT0 before the P89V51 goes into power-down mode the INT0 interrupt works.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Anyone know what to do to get P89V51RB out of power down mode when INT0 asserted?</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Regards,</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Bert van den Berg</P></BODY></HTML> Fri, 25 Nov 2016 00:54:43 GMT bertvandenberg 2016-11-25T00:54:43Z exit from power down mode https://community.nxp.com/t5/8-bit-Microcontrollers/exit-from-power-down-mode/m-p/624393#M22239 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Using P89V51RB2 and DS1337 Real Time Clock chip.&nbsp; Am able to program DS1337 with date/time and set alarm. Put P89V51RB2 into power down mode and set to wake up on active low INT0.&nbsp; The DS1337 lowers the INT0 line as programmed when alarm time reached but the P89V51RB2 does not exit power-down.&nbsp;&nbsp; If I lower INT0 before the P89V51 goes into power-down mode the INT0 interrupt works.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Anyone know what to do to get P89V51RB out of power down mode when INT0 asserted?</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Regards,</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Bert van den Berg</P></BODY></HTML> Fri, 25 Nov 2016 00:54:43 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/exit-from-power-down-mode/m-p/624393#M22239 bertvandenberg 2016-11-25T00:54:43Z