When power saving is required, how should the LCD screen's SEG pin, COM pin, VLVD1-3, and VLCDH related configurations be configured?

一沙一世

When power saving is required, how should the LCD screen's SEG pin, COM pin, VLVD1-3, and VLCDH related configurations be configured? [Copy link]

邀请：@maychang   @damiaa   @vincentc543   @RichSJ   参与回复

When power saving is required, how should the following configurations related to the LCD screen (1) SEG pin (2) COM pin (3) VLVD1-3 VLCDH be configured?

1. YOU

2、OUT

3、ADS

4. PU pull-up

5. PD pull-down

6. POD open drain

7. PDR driver enhancement

vincentc543

雖然我沒做過液晶屏,

但是我能跟你說的是,進入省電狀態,這些IO配置必須符合不能有壓降跨在阻抗上.

這組抗有可能在外部,也有可能在內部

I=V/R , 調整至沒有電流流過阻抗就是你的設置目標.

RichSJ

Sorry, I don't have the information for this chip.

RichSJ

I downloaded the datasheet, but there is no register information and I don't know the configuration details.

RichSJ

I found the HuaDa website and saw the user manual. I wonder if you have read this article: "Precautions for low power mode application of HC32L130_HC32L136 series"

“3.1.3 The IO port system enters low power consumption, and the port status will not change, so customers need to configure the port status according to the actual application to achieve the ideal power consumption value. It is recommended to configure the pull-up input mode for unused ports.”

If ADS is set to 0, LCD is no longer supported. I wonder if there is any problem with your LCD at this time?

If the LCD is buffered and maintains the original image when there is no signal input, you can consider setting it to pull-up input mode as shown in the manufacturer's article.

RichSJ

Is your SEL register set to "0"? Otherwise, it will become another function. User Manual Page 111.

freebsder

You need to look at the chip manual to see what IO mode it is in when low power. Consider high impedance.