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Timing required connecting sed13305 to LC79430 based LCD http://forum.lcdinfo.com/viewtopic.php?f=6&t=9011 |
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Author: | dickydodds [ Wed Oct 26, 2011 13:18 ] |
Post subject: | Timing required connecting sed13305 to LC79430 based LCD |
Dont know if you guys can help but here goes... I have 2 LC79430 based LCD's - yes from ebay! - here http://www.ebay.co.uk/itm/300549241743? ... 1439.l2649 They are new LC79430 and LC79401 based. Model EDT EW50107FLYU 320x240 Pinout is as follows: 1 vo (interestingly, pin 2 and 3 dont adjust contrast with a pot or with -18v applied to vee and the pot connected) 2 vee 3 D3 to 79401 4 D2 to 79401 5 D1 to 79401 6 D0 to 79401 7 gnd 8 +5 9 CL2 to 79401 10 CL1 to 79430 11 FLM (DIOB0) 12 LED K 13 LED A 14 NU Looks like 'm' is generated on board I am using an atmega 88 so I can change the timing parameters of the timings. My program works and LCDstudio works with another 320x240 LCD I have but with on board SED. However, both progs give me a display on the new LCDs with a bought external board with the sed on it but it is as if the framing is too fast on it. I can see the x clocked data displayed in the correct x column but it is all down the screen (as if vertical hold is lost). I have tried various initialisations in my program (lcdhype and lcdstudio wont allow display timing changes ) The current settings I use to init the sed are as follows (I am changing command &H40 P4, P5, P6 and P7 when I try setting up the display): Call Lcd_send_cmd(&H40) Call Lcd_send_data(&H30) Call Lcd_send_data(&H87) Call Lcd_send_data(&H07) Call Lcd_send_data(&H27) Call Lcd_send_data(&H55) Call Lcd_send_data(&Hef) Call Lcd_send_data(&H28) Call Lcd_send_data(&H00) Call Lcd_send_cmd(&H44) Call Lcd_send_data(&H00) Call Lcd_send_data(&H00) Call Lcd_send_data(&Hf0) Call Lcd_send_data(&Hb0) Call Lcd_send_data(&H04) Call Lcd_send_data(&Hf0) Call Lcd_send_cmd(&H4c) Call Lcd_send_cmd(&H5a) Call Lcd_send_data(&H00) Call Lcd_send_cmd(&H5b) Call Lcd_send_data(&H01) Call Lcd_send_cmd(&H59) Call Lcd_send_data(&H10) Call Lcd_send_cmd(&H5d) Call Lcd_send_data(&H07) Call Lcd_send_data(&H87) Call Lcd_send_data(&H4c) Call Lcd_send_cmd(&H46) Call Lcd_send_data(&H00) Call Lcd_send_data(&H00) Call Lcd_send_cmd(&H42) Sorry this is long winded, I know the sed can work with these chips from seeing other datasheets but I dont know what I am doing wrong.... Any help / pointersd appreciated. |
Author: | dickydodds [ Thu Oct 27, 2011 9:31 ] |
Post subject: | Re: Timing required connecting sed13305 to LC79430 based LCD |
All Sorted! I had FLM connected to WF instead of YD and didnt realise I needed a -ve voltage on VEE - 3 x 9volt batteries proved that worked ok! dicky |
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