Why does my ePaper display not work with my ePaper Adapter Board?

October 10, 2019 12:31 pm

When connecting an ePaper display to the ePaper Adapter Board, some users are seeing the busy line going low and not going high again. Luckily, there’s an easy fix.

Our ePaper Adapter Board CFA10084 is compatible with all our entire CFAP family of ePaper displays, but it does require a minor modification to work with some of our displays. There’s a jumper that can be closed to change the resistance between RESE and GND.

If you leave the jumper open and connect a display that needs it closed, the busy signal may not function as expected. The datasheet of each individual display will indicate whether the resistance between RESE and GND should be 3Ω (jumper open) or 0.47Ω (jumper closed).

We’ve also included the handy table below, though you should always
reference the datasheet!

Product Number Product Description RESE Ω
CFAP104212C0-0213 2.13” 3-Color ePaper Display (Red) RESE=0.47Ω / Close Jumper
CFAP104212D0-0213 2.13” Flexible ePaper Display RESE=0.47Ω / Close Jumper
CFAP104212E0-0213 2.13” 3-color ePaper Display (Yellow) RESE=0.47Ω / Close Jumper
CFAP122250A0-0213 2.13″ ePaper Display, Zero Power RESE=3Ω / Open Jumper
CFAP128296C0-0290 2.9” ePaper Display RESE=3Ω / Open Jumper
CFAP128296D0-0290 2.9” 3-Color ePaper Display (Red) RESE=0.47Ω / Close Jumper
CFAP128296E0-0290 2.9” 3-Color ePaper Display (Yellow) RESE=0.47Ω / Close Jumper
CFAP152152A0-0154 1.54” Square ePaper Display RESE=0.47Ω / Close Jumper
CFAP152152B0-0154 1.54″ Square 3-Color ePaper Display (Yellow) RESE=0.47Ω / Close Jumper
CFAP152152C0-0154 1.54″ Square ePaper Display RESE=0.47Ω / Close Jumper
CFAP176264A0-0270 2.7” 3-color ePaper Display (Red) RESE=0.47Ω / Close Jumper
CFAP176264B0-0270 2.7” ePaper Display RESE=0.47Ω / Close Jumper
CFAP200200A0-0154 1.54″ Square ePaper Display RESE=3Ω / Open Jumper
CFAP200200A1-0154 1.54″ Square ePaper Display RESE=3Ω / Open Jumper
CFAP400300A0-0420 4.2″ 3-Color ePaper Display (Red) RESE=0.47Ω / Close Jumper
CFAP400300B0-0420 4.2″ ePaper Display RESE=0.47Ω / Close Jumper
CFAP400300C0-0420 4.2″ 3-Color ePaper Display (Yellow) RESE=0.47Ω / Close Jumper
CFAP600448A0-0583 5.83” ePaper Display RESE=3Ω / Open Jumper
CFAP640384A0-0750 7.5″ ePaper Display RESE=3Ω / Open Jumper

So, where is this jumper?

Here’s the adapter board with the jumper left open:

Adapter with jumper open

Now let’s zoom in to that top right corner.

Adapter Jumper OPEN zoom view

There it is! Now, let’s see it closed up.

Adapter Jumper closed

Ready to go!

Still need assistance with your project?

As always, please call, email, or chat with our friendly support team to discuss any issues you’re running into.

Categorized in:

Comments are closed here.