PSoC4500S series : Bias mode of Segment LCD component

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MiNe_85951
Level 7
Level 7
Distributor - TED (Japan)
50 likes received 500 replies posted 50 solutions authored

Hi,

 

We are considering PSoC4500S as a segment LCD driver.

The specifications required for the segment LCD driver are "COM x8, SEG x32, 1/3 bias".

 

I confirm for the Segment LCD components of PSoC4S, but 4 com can support 1/3 bias, but 8 com cannot support 1/3 bias.

MaMi_1205306_0-1634864692499.png

 

PSoC4 Segment LCD(SegLCD)  component v1.30 datasheet URL

https://www.cypress.com/file/220341/download

 

Do you know how to make 1/3 bias compatible with 8 com?

Regards,

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1 Reply
Aashita_R
Moderator
Moderator
Moderator
50 likes received 100 solutions authored 250 replies posted

Hi @MiNe_85951 ,

As per the information shared by you and also as mentioned through the table in the datasheet, I see that there are some limitations with the combination of 8 COM and 1/3 bias use cases. However, I would confirm internally once and post here my response once I get a reasoning from my internal team.

Meanwhile, you can go through the application note here : https://www.cypress.com/documentation/application-notes/an87391-psoc-4-segment-lcd-direct-drive. This AN has pointers to some basic projects which you can check at your end for initial testing. Please add here in case you have any further query. 

Best Regards,

Aashita

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