topic LPCOpen v2.10 Brown Out Detect (BOD) issues for LPC40xx in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/LPCOpen-v2-10-Brown-Out-Detect-BOD-issues-for-LPC40xx/m-p/586183#M21396 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by AndyMcC on Fri Dec 12 03:06:27 MST 2014</STRONG><BR /><SPAN>The LPCOpen v2.10 release notes for the LPC17xx/LCP40xx at </SPAN><A _jive_internal="true" class="" href="https://community.nxp.com/external-link.jspa?url=http%3A%2F%2F">http://www.lpcware.com/content/project/lpcopen-software-development-platform-nxp-lpc-microcontrollers/lpcopen-lpc17xx</A><SPAN> state:</SPAN><BR /><HR /><SPAN style="color: #0000ff;"><STRONG>Quote: </STRONG><BR />Known issues (Carry-Over)<BR /> •The BOD (Brown Out Detector) example doesn’t seem to work on the LPC1788 and LPC408.</SPAN><HR /><BR /><SPAN>The header file: sysctl_17xx_40xx.h has the inline functions: Chip_SYSCTL_EnableBOD(), Chip_SYSCTL_DisableBOD(), Chip_SYSCTL_EnableBODReset() and Chip_SYSCTL_DisableBODReset(), which contain bit polarity errors in that bits are set when they should be cleared and vice versa.</SPAN><BR /><BR /><SPAN>From the LPC 407x/408x user manual (UM10562), section 3.3.2.1 Power Mode Control register:</SPAN><BR /><HR /><SPAN style="color: #0000ff;"><STRONG>Quote: </STRONG><BR />3 BOGD Brown-Out Global Disable.<BR />When BOGD is 1, the Brown-Out Detect circuitry is fully disabled at all times, and does not consume power.<BR />When BOGD is 0, the Brown-Out Detect circuitry is enabled.<BR />See the System Control Block chapter for details of Brown-Out detection.<BR />Note: the Brown-Out Reset Disable (BORD, in this register) and the Brown-Out Interrupt (see Section 5.1) must be disabled when software changes the value of this bit.<BR /><BR />4 BORD Brown-Out Reset Disable.<BR />When BORD is 1, the BOD will not reset the device when the VDD(REG)(3V3) voltage dips goes below the BOD reset trip level. The Brown-Out interrupt is not affected.<BR />When BORD is 0, the BOD reset is enabled.<BR />See the Section 3.6 for details of Brown-Out detection.</SPAN><HR /><BR /><SPAN>The attached file has corrected, commented versions of these inline functions.</SPAN><P><STRONG>Original Attachment has been moved to: <A _jive_internal="true" href="https://community.nxp.com/docs/DOC-337938">sysctl_17xx_40xx_awm.h.zip</A></STRONG></P></BODY></HTML> Wed, 15 Jun 2016 20:24:47 GMT lpcware 2016-06-15T20:24:47Z LPCOpen v2.10 Brown Out Detect (BOD) issues for LPC40xx https://community.nxp.com/t5/LPC-Microcontrollers/LPCOpen-v2-10-Brown-Out-Detect-BOD-issues-for-LPC40xx/m-p/586183#M21396 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by AndyMcC on Fri Dec 12 03:06:27 MST 2014</STRONG><BR /><SPAN>The LPCOpen v2.10 release notes for the LPC17xx/LCP40xx at </SPAN><A _jive_internal="true" class="" href="https://community.nxp.com/external-link.jspa?url=http%3A%2F%2F">http://www.lpcware.com/content/project/lpcopen-software-development-platform-nxp-lpc-microcontrollers/lpcopen-lpc17xx</A><SPAN> state:</SPAN><BR /><HR /><SPAN style="color: #0000ff;"><STRONG>Quote: </STRONG><BR />Known issues (Carry-Over)<BR /> •The BOD (Brown Out Detector) example doesn’t seem to work on the LPC1788 and LPC408.</SPAN><HR /><BR /><SPAN>The header file: sysctl_17xx_40xx.h has the inline functions: Chip_SYSCTL_EnableBOD(), Chip_SYSCTL_DisableBOD(), Chip_SYSCTL_EnableBODReset() and Chip_SYSCTL_DisableBODReset(), which contain bit polarity errors in that bits are set when they should be cleared and vice versa.</SPAN><BR /><BR /><SPAN>From the LPC 407x/408x user manual (UM10562), section 3.3.2.1 Power Mode Control register:</SPAN><BR /><HR /><SPAN style="color: #0000ff;"><STRONG>Quote: </STRONG><BR />3 BOGD Brown-Out Global Disable.<BR />When BOGD is 1, the Brown-Out Detect circuitry is fully disabled at all times, and does not consume power.<BR />When BOGD is 0, the Brown-Out Detect circuitry is enabled.<BR />See the System Control Block chapter for details of Brown-Out detection.<BR />Note: the Brown-Out Reset Disable (BORD, in this register) and the Brown-Out Interrupt (see Section 5.1) must be disabled when software changes the value of this bit.<BR /><BR />4 BORD Brown-Out Reset Disable.<BR />When BORD is 1, the BOD will not reset the device when the VDD(REG)(3V3) voltage dips goes below the BOD reset trip level. The Brown-Out interrupt is not affected.<BR />When BORD is 0, the BOD reset is enabled.<BR />See the Section 3.6 for details of Brown-Out detection.</SPAN><HR /><BR /><SPAN>The attached file has corrected, commented versions of these inline functions.</SPAN><P><STRONG>Original Attachment has been moved to: <A _jive_internal="true" href="https://community.nxp.com/docs/DOC-337938">sysctl_17xx_40xx_awm.h.zip</A></STRONG></P></BODY></HTML> Wed, 15 Jun 2016 20:24:47 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPCOpen-v2-10-Brown-Out-Detect-BOD-issues-for-LPC40xx/m-p/586183#M21396 lpcware 2016-06-15T20:24:47Z Re: LPCOpen v2.10 Brown Out Detect (BOD) issues for LPC40xx https://community.nxp.com/t5/LPC-Microcontrollers/LPCOpen-v2-10-Brown-Out-Detect-BOD-issues-for-LPC40xx/m-p/586184#M21397 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by NXP_Support on Mon Dec 15 19:01:00 MST 2014</STRONG><BR /><SPAN>Thank you AndyMcC!</SPAN><BR /><SPAN>We logged this to be corrected in the next LPC17xx/40xx release update.</SPAN><BR /><SPAN>-NXP Support</SPAN></BODY></HTML> Wed, 15 Jun 2016 20:24:47 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPCOpen-v2-10-Brown-Out-Detect-BOD-issues-for-LPC40xx/m-p/586184#M21397 lpcware 2016-06-15T20:24:47Z