{"id":3154,"date":"2012-01-14T21:05:07","date_gmt":"2012-01-15T02:05:07","guid":{"rendered":"https:\/\/example.com\/?postname=psp-lcd-part-1-the-hardware-concept"},"modified":"2012-01-14T21:05:07","modified_gmt":"2012-01-15T02:05:07","slug":"psp-lcd-part-1-the-hardware-concept","status":"publish","type":"post","link":"http:\/\/atomsofttech.com\/blog\/uncategorized\/psp-lcd-part-1-the-hardware-concept\/","title":{"rendered":"PSP LCD Part 1 – The hardware concept"},"content":{"rendered":"

Ok first things first, before i even try to code this puppy i want to make a basic idea of whats needed hardware and software wise.<\/p>\n

To do this lets take a look at the datasheet<\/a>.\u00a0 (If link is down google: Sharp Datasheet LQ043T3DX02)<\/p>\n

Okay scrolling through the datasheet we hit page 7 which has a pin-out of the device. As you can see it shows 40 pins.<\/p>\n

\"\"<\/a><\/p>\n

And on page 8 the Backlight is an additional 4 pins.\"\"<\/a>
\nThats not all going to be on our main MCU\/FPGA but just need to know info. The main pins for our controller will be all the data pins and perhaps a pin for the backlight control.<\/p>\n

RED (8),\u00a0 GREEN(8),\u00a0 BLUE(8), CK (1), DISP(1), Hsync(1), Vsync(1) for a total of 28 + (1) Backlight Pin = 29 Pin will be controlled by our controller. So as you can see thats a ton. Dont worry about the meaning of these for now.<\/p>\n

Things we know:
\n1) 40 Pin Connector is needed where 28 of these pins go to our controller
\n2) 4 Pin Connector is need for back light where 1 will be controlled (via transistor most likely)<\/p>\n

Okay if you actually read the small print on page 7 you will see the connector type recommended… FH12A-40S-0.5SH(55)<\/a><\/p>\n

We dont HAVE to use that connector if we dont want to but the datasheet has all the info we need to find similar ones.<\/p>\n

\"\"<\/a>From the above we can get the PITCH and PIN COUNT.. also we can see in the datasheet it says: “Top contact type”
\nWe can now decode the connector to be: FH Series #12 , TOP CONTACT TYPE,\u00a0 40 CONTACTS, SINGLE STANDARD, 0.5mm PITCH, HORIZONTAL, GOLD PLATED<\/p>\n

The most important part of this for searching for a replacement is: Top Contact, 40 Contacts, 0.5mm Pitch, Horizontal(RIGHT)<\/p>\n

The main reason i add this part is to save people money. The recommended connector cost about $3 each… thats a lot of dough for 1 piece of plastic smaller than my pinky.
\nYou can also simply search there part number in MOUSER and on the bottom you get a option to show similar based on whats checked. I suggest unchecking the Manufacture and Other non important things like GOLD etc… I found this part which is $0.63: 62684-402100ALF<\/a><\/p>\n

For the Backlight part its a bit harder. The only thing they give you is its a KYOCERA 6298 which if you google you will find its a 0.5mm part bottom contact… datasheet<\/a>
\nThe exact part number would be : 046298004000883 … which is weird as it is. So now that we know this lets mouser it and see how much… $2.21 EACH! OMG for something the size of my pinky NAIL \ud83d\ude42 Guess what! I found this one for $0.25\u00a0 10062827-0410EDLF<\/a> see the difference? Save some money! or just buy more \ud83d\ude00 Mistakes happen you know.<\/p>\n

So far we saved some money and can get both connectors for under $1 ($0.88)! You can buy 3-4 sets for the same price as 1 recommended part \ud83d\ude42<\/p>\n

Back to the LCD part now. This LCD runs on a few different voltages. Even tho it says 2.5v in the pin listing it can do 3.3v (says so on page 9).
\nNow we can eliminate the 2.5v with a single 3.3v. Now for the backlight… page 13 states the Backlight needs 29.4v @ 20mA MAX… now as we all know we dont have a 29v supply so we have to make a boot converter. I wont go into boost converters much here but will give you a nice link to my favorite calculator.<\/p>\n

http:\/\/www.nomad.ee\/micros\/mc34063a\/index.shtml<\/a><\/p>\n

I thank goodness i found that link. It has helped me so many times. I will use it here to make a boost convertor for 3.3v to 29v with a max variation of 100mV since this can handle 29.4v i think 29.1v will be good. The max current needed is 20mA so lets design for that also.<\/p>\n

This took me about 5 seconds to fill in and another 1 second to press the button \ud83d\ude42 saved me time from doing calculations by hand:<\/p>\n

\"\"<\/a>Now we have a boost circuit to power our backlight also. We will just use a power mosfet or something to control the backligh on\/off (gnd).<\/p>\n

Ok thats about it for now. Keep checking back for: PSP LCD Part 2: Selecting a Controller & Schematic
\n<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Ok first things first, before i even try to code this puppy i want to make a basic idea of whats needed hardware and software wise. To do this lets take a look at the datasheet.\u00a0 (If link is down google: Sharp Datasheet LQ043T3DX02) Okay scrolling through the datasheet we hit page 7 which has […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-3154","post","type-post","status-publish","format-standard","hentry"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/posts\/3154","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/comments?post=3154"}],"version-history":[{"count":0,"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/posts\/3154\/revisions"}],"wp:attachment":[{"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/media?parent=3154"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/categories?post=3154"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/atomsofttech.com\/blog\/wp-json\/wp\/v2\/tags?post=3154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}