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segment LCD interface

zaalzaalak222
Associate II
Posted on June 09, 2012 at 15:13

I have a STN LCD (that have only 24 segment and 1 common)-at 3.3 volt.

Can I use stm32f103 to drive it directly?(by 100Hz toggling segments with respect to common pin)

Is  there any note for this method?

Is there any problem in longtime for aging of LCD?

5 REPLIES 5
alok472
Associate II
Posted on June 11, 2012 at 11:17

Pls see if AN2656 can help you

http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/APPLICATION_NOTE/CD00176444.pdf

Did you evaluate STM32L which has inbuild LCD controller

alok472
Associate II
Posted on June 11, 2012 at 11:18

Pls see if AN2656 can help you

http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/APPLICATION_NOTE/CD00176444.pdf

Did you evaluate STM32L which has inbuild LCD controller

zaalzaalak222
Associate II
Posted on June 11, 2012 at 11:47

The STM32L does not have CAN controller and I need it too on my MCU.

My application need CAN and LCD segment driver at the same time.

number of segments is low(24) and I have one common on LCD.I think I can drive it with stm32f103cbt6.

I only worry about its long term operation.Is there any note to be considered on HW and FW?

alok472
Associate II
Posted on June 11, 2012 at 12:26

Did you see already AN2656 put in my post ?

There is no long term problems in SW driving as per my experience

zaalzaalak222
Associate II
Posted on June 12, 2012 at 09:54

thanks,I saw it.