topic S12X EWAITE function in S12 / MagniV Microcontrollers https://community.nxp.com/t5/S12-MagniV-Microcontrollers/S12X-EWAITE-function/m-p/129053#M1060 <HTML><HEAD></HEAD><BODY><SPAN>Hi, We have a LCD controller connected to a S12XDP512, The LCD controller wait pin is connected to EWAITE on the micro. When I enable The external wait function via EBCTRL1 the micro locks up and a COP intrrupt occurs. I notice that the LCD controller asserts it's Wait line ( active low) on a read or write, but it stays low, which I guess is upseting the micro/debugger. If I disable the External wait function, the line will go low and then high on aread or write. Does anyone have any idea why this happens? Cheers!</SPAN></BODY></HTML> Mon, 04 Sep 2006 10:18:17 GMT gpio 2006-09-04T10:18:17Z S12X EWAITE function https://community.nxp.com/t5/S12-MagniV-Microcontrollers/S12X-EWAITE-function/m-p/129053#M1060 <HTML><HEAD></HEAD><BODY><SPAN>Hi, We have a LCD controller connected to a S12XDP512, The LCD controller wait pin is connected to EWAITE on the micro. When I enable The external wait function via EBCTRL1 the micro locks up and a COP intrrupt occurs. I notice that the LCD controller asserts it's Wait line ( active low) on a read or write, but it stays low, which I guess is upseting the micro/debugger. If I disable the External wait function, the line will go low and then high on aread or write. Does anyone have any idea why this happens? Cheers!</SPAN></BODY></HTML> Mon, 04 Sep 2006 10:18:17 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/S12X-EWAITE-function/m-p/129053#M1060 gpio 2006-09-04T10:18:17Z Re: S12X EWAITE function https://community.nxp.com/t5/S12-MagniV-Microcontrollers/S12X-EWAITE-function/m-p/129054#M1061 <HTML><HEAD></HEAD><BODY>Hi,<BR /><BR />the PK7 pin is an input when the EWAIT function is disabled and you are doing nothing with the pin. I guess the signal is driven by your LCD controller. It probably asserts the WAIT signal as a response to the write operation on the bus and then de-asserts it again when the /WR signal disappears. Look into the spec of the LCD.<BR /><BR />Daniel</BODY></HTML> Fri, 08 Sep 2006 00:52:12 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/S12X-EWAITE-function/m-p/129054#M1061 DanielM 2006-09-08T00:52:12Z