LPC Microcontrollersのトピック4-bit Planar EL display timing restrictions https://community.nxp.com/t5/LPC-Microcontrollers/4-bit-Planar-EL-display-timing-restrictions/m-p/522416#M5052 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by adampmtnw on Mon Jun 25 16:24:32 MST 2012</STRONG><BR /><SPAN>I am working on a demo to start incorporating the LPC1788 in one of our products. I'm using the LPC1788 and a Planar EL display. According to Planar no horizontal front or back porch is required. The 177x8x UM states on page 290 horizontal timing restrictions of a horz. back and front porch of 5 clock cycles due to DMA timing restrictions. A conflicting statement in the Vertical Sync. Pulse Width register description states "The number of horz. sync line must be small ... (program to zero) ..."</SPAN><BR /><BR /><SPAN>I am confused; is it possible to program the HFP and HBP to zero? I am currently unable to get anything to show on the EL display and I suspect this may be part of the issue.</SPAN><BR /><BR /><SPAN>Additional Info:</SPAN><BR /><SPAN> - 4-bit interface</SPAN><BR /><SPAN> - 1 bit per pixel</SPAN><BR /><SPAN> - 160 x 80 resolution</SPAN><BR /><BR /><SPAN>Thank you,</SPAN><BR /><SPAN>Adam</SPAN></BODY></HTML> Wed, 15 Jun 2016 17:55:01 GMT lpcware 2016-06-15T17:55:01Z 4-bit Planar EL display timing restrictions https://community.nxp.com/t5/LPC-Microcontrollers/4-bit-Planar-EL-display-timing-restrictions/m-p/522416#M5052 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by adampmtnw on Mon Jun 25 16:24:32 MST 2012</STRONG><BR /><SPAN>I am working on a demo to start incorporating the LPC1788 in one of our products. I'm using the LPC1788 and a Planar EL display. According to Planar no horizontal front or back porch is required. The 177x8x UM states on page 290 horizontal timing restrictions of a horz. back and front porch of 5 clock cycles due to DMA timing restrictions. A conflicting statement in the Vertical Sync. Pulse Width register description states "The number of horz. sync line must be small ... (program to zero) ..."</SPAN><BR /><BR /><SPAN>I am confused; is it possible to program the HFP and HBP to zero? I am currently unable to get anything to show on the EL display and I suspect this may be part of the issue.</SPAN><BR /><BR /><SPAN>Additional Info:</SPAN><BR /><SPAN> - 4-bit interface</SPAN><BR /><SPAN> - 1 bit per pixel</SPAN><BR /><SPAN> - 160 x 80 resolution</SPAN><BR /><BR /><SPAN>Thank you,</SPAN><BR /><SPAN>Adam</SPAN></BODY></HTML> Wed, 15 Jun 2016 17:55:01 GMT https://community.nxp.com/t5/LPC-Microcontrollers/4-bit-Planar-EL-display-timing-restrictions/m-p/522416#M5052 lpcware 2016-06-15T17:55:01Z