Who can help me finding the datasheet for ICN2025BP by Chipone? - Page 1
Forum section: electronics / repair

author: htm
author_rank: Regular Contributor
timestamp: October 09, 2024, 07:35:17 pm
content: Hi,i've got LED panel(type mentionedherein another post), having 2 rows of 6P10RGB-panels(16x32pixels).and i'm hoping to find a way to control them by software.But it has this ICN2025BP chip for which i can't find the datasheet.Ps. i searched mouser, used google and yandex, but didn't find anything useful.On youtube i did find someone who reverse-engineering a RGB panel which used another Chipone chip ICN2053 and had at least a datasheet.part 1part 2But i found nothing for the ICN2025BP :/I'm hoping one of you can find it.

author: tom66
author_rank: Super Contributor
timestamp: October 09, 2024, 07:58:17 pm
content: That chip is probably just a standard shift register with current control and latching. Bog standard part, compare to TI TLC5940.Chances are that any other LED display panel will have the same pinout, the Chinese are very good at doing that, there will be 10-20 companies all making panels with identical pinouts. So if you find the pinout of a display with the same IDC connector then it will work.These displays will require a fast microcontroller or FPGA to drive, since you are usually having to construct the PWM values yourself. (This can be done by subfield multiplexing. Other techniques are available.) See a project I did here:https://wiki.leedshackspace.org.uk/wiki/Projects/Big_Ass-LED_Display(Also this isn't really a repair question.)

author: htm
author_rank: Regular Contributor
timestamp: October 10, 2024, 06:48:21 am
content: Thanks.i moved it to repair, because there i thought most people are in search of datasheets.The RGB-panels mentioned in those video's had chipone ICN2053's, which are not the standard shift register, but have internal PWM modulation and even RAM.The original controllerboard "RHX-8Q2" built in to the panel has a RDA5918B microcontroller and 2 buffer IC's MW245B.i think it's impressive how it manages it with reasonable microcontroller.In the following table you can see the modes limits;RHX-8Q2 specs inthis google-translated pageThe sellers' specifications say "Support special chip modules such as ICN2038S/SM16188B". The ICN2038S also has built in Ram and command processing.I'm hoping mine (ICN2025BP) hasn't. I'm hoping to find a datasheet somehow.

author: htm
author_rank: Regular Contributor
timestamp: October 19, 2024, 12:47:08 pm
content: i have not found the ICN2025BP chip details, but i did try the panel using- Raspberry PI 3B+,- PCB: 'Joy-it RGB MatrixCtrl' HAT,https://www.joy-it.net/en/products/RB-MatrixCtrl- Software:https://github.com/hzeller/rpi-rgb-led-matrixAfter some fiddling around, i found the settings which work for the "P10RGB-3535-4S-V3.3";sudo python3 grayscale-block.py --led-rows 16 --led-chain 3 --led-cols 32 --led-slowdown-gpio 3 --led-multiplexing 4 --led-show-refreshnotably,ParameterRefresh rate_________________________--led-slowdown-gpio 1800Hz. But panel shows an incomprehensible noise pattern--led-slowdown-gpio 2750Hz.--led-slowdown-gpio 3690Hz.--led-slowdown-gpio 4600Hz.ParameterComment_________________________--led-multiplexing 4The filemultiplex-mappers.ccuses the following class:(new ZStripeMultiplexMapper("ZStripe", 0, 8 ))The pixels of the panel "P10RGB-3535-4S-V3.3" of w32 x h16 seem to be addressed as follows:- 1 row-nr address a line in both top half(w32 x h8) and bottom half(w32 x h8). (as with hub75)- 1 row-nr adrresses pixels in a Z order, like:a) - it's 8 pixels in-line,b) - then it continues 4 lines lower starting 8 pixels back(like cariage return)c) - it's 8 pixels in-line,d) - then starts the next block of 8x8 to the right of it, 8 lines up, connecting to the end of the pixels in a)i could be wrong with some addressing details, but i'm led to believe the above because of the pixel test-pattern available in the "RHX Plus V8" app.