GNUBoot/gnuboot
GNUBoot
/
gnuboot
mirror of https://git.savannah.gnu.org/git/gnuboot.git
2
1
Fork 0
Code Issues Releases Activity

docs/install/spi: note about wp/hold pins on ch341a

This commit is contained in:
Leah Rowe 2021-10-16 09:10:52 +01:00
parent cb0b313dd6
commit 4d5ac6cd5b
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
site/docs/install/spi.md
View File

@ -52,6 +52,8 @@ In practise, most people will not fix their ch341a and instead just risk it,
so no documentation will be provided for ch341a on this website. It is best so no documentation will be provided for ch341a on this website. It is best
to discourage use of that device. to discourage use of that device.
**Not covered on that eevblog page: the WP/HOLD pins (pins 3 and 7) must be held high via pull-up resistors, but on CH341A dongles, they are directly connected to 3.3V DC (continuity with pin 8). It is advisable to cut these two connections, to the WP and HOLD pins, and jump the cuts using pull-up resistors instead. A value between 1k to 10k (ohms) should be fine.**
In case it's not clear: In case it's not clear:
Please do not buy the ch341a! It is incorrectly engineered for the purpose of Please do not buy the ch341a! It is incorrectly engineered for the purpose of