Thanks for your quck response. Just a clarification about the 3.3V/5V thing...
I'm powering the LCD module off 5V, of course, but the signals (SCL and SDA) are pulled high to 3.3V, not 5V. In the past, this has worked fine with most 5V I2C devices because the Vih of a typical IC is 2.4 V, and the 3 ...
Search found 2 matches
- Fri Oct 04, 2002 6:25 pm
- Forum: LK/ELK/VK/PK/OK/MX/GLK/EGLK/GVK/GLT
- Topic: LK162-12 I2C Voltage & Signaling Speed
- Replies: 3
- Views: 2732
- Thu Oct 03, 2002 10:41 pm
- Forum: LK/ELK/VK/PK/OK/MX/GLK/EGLK/GVK/GLT
- Topic: LK162-12 I2C Voltage & Signaling Speed
- Replies: 3
- Views: 2732
LK162-12 I2C Voltage & Signaling Speed
I'm having trouble getting I2C to work on an LK162-12 display. I have three questions.
1) I'm driving the display in a 3.3V system (my I2C bus has pull-ups to 3.3V, not 5V). What is the threshold (Vih) for the I2C input on the LK162-12? Normally, this works because 3.3V is usually higher than the ...
1) I'm driving the display in a 3.3V system (my I2C bus has pull-ups to 3.3V, not 5V). What is the threshold (Vih) for the I2C input on the LK162-12? Normally, this works because 3.3V is usually higher than the ...