Using my CH341A.

[keeney123]

Re: Using my CH341A.

This might help you.

[Spork Schivago]

Re: Using my CH341A.

This is stupid. I found a video with download links for the software and drivers.

https://www.youtube.com/watch?v=5NYe21nFSDI

I install the drivers, still nothing. I decide to watch the video, just for shits and giggles. About half way through, the guy says the jump has to be on pins 1-2, otherwise it won't work. He's right. Even though the board says jumper 1-2 is for 3.3V and my chip I'm currently trying to read requires 5V, for some reason, when I have it on 2-3, I get device not detected. But when I switched it to 1-2 (3.3V), now I can read, write, erase, blank, all of that!

[diif]

Re: Using my CH341A.

Did you get the little board with the header pins ?
Start with something we know can be read the 25Q16BSIG. Solder it to the little board add the header pins and plug it into the ZIF.
It needs putting in the correct part of the ZIF as indicated by the screenprint.

[Spork Schivago]

Re: Using my CH341A.

Blah! I can't dump this EEPROM. The software supports the Atmel chip I'm trying to dump, the 24C04A. I've tried multiple versions of the software. Every time, I have to add an exception to my Anti-virus program because it flags it as a virus, even Stj's upload. I don't think it's a virus, just a false positive. The newer version of the software (version 1.29) says there's no driver, but device manager shows the device under Ports (COM and LPT) as a USB-SERIAL CH341A (COM3).

It's a SMAKN® USB Programmer CH341A. This sucks. I don't know if the chip is bad, or if it's a driver issue or a software issue or what. I figured if it had the CH341 in it, any of the softwares would work, but maybe I need something specifically for this device. And of course, the people who made it don't have drivers or software. They say to use Google.

Any suggestions? I wish Stj was here!

[Spork Schivago]

Re: Using my CH341A.

What worries me is those address lines. My CH341A has markings for two different types of chips, 25 SPI BIOS and 24 I2C EEPROM

These Atmel chips have the numbers 24 in them, so I'm thinking it can maybe read and write to them, but there's no header pins for addresses. I believe the 24 I2C EEPROMs use the TXD and RXD header pins, not the MOSI and MIOS. I think I'm going to try it though. Worse case, I ruin one of the chips. Worse case, I just unsolder the EEPROMs from the bad board and put them on the good board. I'll try dumping the EEPROM from the good board, the one that doesn't seem to work with this TV, and see what happens.

[Spork Schivago]

Re: Using my CH341A.

I wonder if I can dump something like this:

http://pdf1.alldatasheet.com/datashe...-10SE-2.7.html

With this device. I have a TV I can't order the same replacement board for. I have one, came from the same make and model TV, but is different a little, believe it or not! I'm wondering if I switch the EEPROMs around if the newer replacement board would work....while I'm at it though, I'd like to dump the EEPROMs. It'd be nice if I could do that using this device.

[Spork Schivago]

Re: Using my CH341A.

I figured it out using the continuity meter.

chip    adapter
------------------
CS#  ->  CS
SO  ->  MIOS
WP#  ->  3.3V
VSS  ->  GND
VCC  ->  3.3V
HOLD# ->  3.3V
SCLK ->  CLK
SI  ->  MOSI

Because I only have one 3.3V jumper, I think what I'm going to do is just use the head strips that came with it and put them into the ZIF socket and then use my jumper wires and connect them to those header pins in the ZIF socket, then use my 8-pin adapter to click onto the SPI flash chip and try to read it.

[Spork Schivago]

Hello,

I bought my CH341APro and it arrived in the mail today. It's very similar to this one: https://tosiek.pl/wp-content/uploads...programmer.jpg

It's the same colour and has the same components, but the three caps in the upper left of the board in the picture are all aligned, but on mine, the third one is a bit further down physically on the board. I probably have some clone or something.

Anyway, I want to try dumping the firmware on this 25Q16BSIG. The pins I have on the 25Q16BSIG are:

CS#, SO, WP#, VSS, VCC, HOLD#, SCLK, and SI.

I'm not going to be using the ZIF socket but the headers to hook to my 25Q16BSIG. On the underside of the CH341A, I see the pins are header pins are labeled like this:

5V		5V
3.3V		GND
GND		RXD
MIOS	TXD
MOSI	3
CS		2
CLK		1

I see where it says 1-2 are something, but it's in Chinese. 2-3 are for TTL (and then there's chinese). This SPI flash chip has a full voltage range of 2.7VDC ~ 3.6VDC, so I'm going to leave it on 1-2. I'm assuming TTL is for 5V TTL logic devices.

RXD and TXD, to me, are transmit and receive for serial devices. I'm wondering if maybe the left side, that has the 5V pin, the 3.3V pin, the GND, MIOS, MOSI, CS, and CLK pins are for this type of chip and maybe the other side with the 5V, GND, RXD, and TXD are for some other type of chip.

I'm thinking I should hook the 3.3V pin to the VCC pin on the SPI flash chip, the GND to VSS, the CS to the CS# on the chip, the CLK to the SCLK on the chip....but then what? MIOS to the SO pin on the chip and MOSI to the SI pin on the chip? Or vice-versa? Or do I hook the TXD to the SO (data output) and the RXD to the SI (data input)?

Everyone on-line seems to just put the chip in the ZIF or use the soldering PCB that came with it. Any suggestions?