Can single digit 7-segment displays use free digits from a multi-digit multiplexer?

Question

The title's a bit convaluted, so I'll ellaborate.

I'm driving a 4-digit 7-segment display with a multiplexing controller, the kind where it sets one display at a time and relies on persistence of vision to make it look like they're all on. It's the AS1115, you can see its datasheet here.

Anyway, my device also has a few single-digit 7-segment displays. Since the controller can control 8 digit displays and 4 of the digits aren't in use, I was wondering if it was possible to connect these seperate displays to the same controller, to save money and power?

Sidenote: Here's my 4-digit display and here's my single-digit display.

Answer 1

Yes, you can drive the additional digits as they are both common-cathode.

The AS1115 seems particularly well-suited since (according to the datasheet big print) it allows brightness to be set on a digit-by-digit basis. This is important because the typical luminous intensity at a given average current is not well matched between the two displays.

• Steam Ranger: Thanks. Just wanted to make sure.