Neoprogrammer 21 019 Ch341a Full
| CH341A Pin | Connection |
|------------|--------------------|
| CS | Chip Select (CS#) |
| MOSI | Master Out Slave In |
| MISO | Master In Slave Out |
| CLK | Clock |
| VCC (3.3V) | Chip VCC (3.3V) |
| GND | Chip GND |
Important:
Physical connection options:
The "Fake Chip" Issue: Some cheaper programmers use counterfeit CH341 chips that run at a slower baud rate or fail with specific software versions. Using the "Neoprogrammer" software usually fixes this as it is more tolerant of chip variants.
Write fails or verification mismatch:
Unsupported chip: Consult chip datasheet for SPI command compatibility or use a different programmer with broader chip support.