topic MC9S08GT16 - problems with entering stop mode in 8-bit Microcontrollers https://community.nxp.com/t5/8-bit-Microcontrollers/MC9S08GT16-problems-with-entering-stop-mode/m-p/138460#M4986 <HTML><HEAD></HEAD><BODY><DIV>Hi,</DIV><DIV>I am trying to put microcontroller to stop mode 3 using this code:<BR />/* register initialization */<BR />&nbsp; SOPT = 0x73;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR />&nbsp; SPMSC1 = 0x1C;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR />&nbsp; SPMSC2 = 0x00;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR />&nbsp; ICGC1 = 0x3C;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR />&nbsp; ICGC2 = 0x7C;</DIV><DIV>...</DIV><DIV>...</DIV><DIV>MCUInit();</DIV><DIV>Main(){</DIV><DIV>...</DIV><DIV>...</DIV><DIV>asm STOP</DIV><DIV>...</DIV><DIV>}</DIV><DIV>The problem is that the microcontroller doesn't enter stop mode. It executes the instruction asm STOP and&nbsp;goes to the next line of code, continuing&nbsp;normal work.</DIV><DIV>What do I do wrong? How should entering (and leaving) stop mode look like?</DIV><DIV>Please help,</DIV><DIV>- Marigold</DIV></BODY></HTML> Wed, 27 Jun 2007 20:24:01 GMT marigold 2007-06-27T20:24:01Z MC9S08GT16 - problems with entering stop mode https://community.nxp.com/t5/8-bit-Microcontrollers/MC9S08GT16-problems-with-entering-stop-mode/m-p/138460#M4986 <HTML><HEAD></HEAD><BODY><DIV>Hi,</DIV><DIV>I am trying to put microcontroller to stop mode 3 using this code:<BR />/* register initialization */<BR />&nbsp; SOPT = 0x73;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR />&nbsp; SPMSC1 = 0x1C;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR />&nbsp; SPMSC2 = 0x00;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR />&nbsp; ICGC1 = 0x3C;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR />&nbsp; ICGC2 = 0x7C;</DIV><DIV>...</DIV><DIV>...</DIV><DIV>MCUInit();</DIV><DIV>Main(){</DIV><DIV>...</DIV><DIV>...</DIV><DIV>asm STOP</DIV><DIV>...</DIV><DIV>}</DIV><DIV>The problem is that the microcontroller doesn't enter stop mode. It executes the instruction asm STOP and&nbsp;goes to the next line of code, continuing&nbsp;normal work.</DIV><DIV>What do I do wrong? How should entering (and leaving) stop mode look like?</DIV><DIV>Please help,</DIV><DIV>- Marigold</DIV></BODY></HTML> Wed, 27 Jun 2007 20:24:01 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/MC9S08GT16-problems-with-entering-stop-mode/m-p/138460#M4986 marigold 2007-06-27T20:24:01Z Re: MC9S08GT16 - problems with entering stop mode https://community.nxp.com/t5/8-bit-Microcontrollers/MC9S08GT16-problems-with-entering-stop-mode/m-p/138461#M4987 <HTML><HEAD></HEAD><BODY>I'm not sure, but I think you should change your instructions with these:<BR /><BR />SOPT = 0x73&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -----&gt; SOPT |= 0x20<BR />SPMSC2 = 0x00 -----&gt; SPMSC2 |= 0x02<BR /><BR />These instructions must be after MCUInit() function. You must use, after all, EnableInterruopt() function.<BR /><DIV></DIV></BODY></HTML> Wed, 28 Nov 2007 17:35:03 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/MC9S08GT16-problems-with-entering-stop-mode/m-p/138461#M4987 nogA 2007-11-28T17:35:03Z