3 ms·
Lucky that he was able to use a clip - the power draw of the other components on the board sometimes overwhelms the programmer and causes the voltage to sag. Wh
by digitallyfree 5y ago
Lucky that he was able to use a clip - the power draw of the other components on the board sometimes overwhelms the programmer and causes the voltage to sag. When my BIOS failed I was unable to use a clip and had to desolder (don't have hot air equipment). Ended up pulling off one of the pads under the SOIC8 BIOS chip and had to reroute the pin of the newly programmed chip to another point on the board.
Also props to the writer for mentioning the fact that the CH341A drives the flash chip with 5V rather than 3.3V without modification. Many sites don't mention that and that can destroy a 3.3V chip. I believe the datasheet for my Winbond chip mentioned that the limit was 4.3V or something like that. I only figured that out when I probed the programmer's signals as a sanity check before programming.