I have a question here. If i wanted to make my output data in 3 digits with 2 decimal points (Example: 2.98V , 3.27V ...... the range is from 0.00V - 5.00 V). So after processed by the microcontroller, how can i connect them(i have 3 7 segment displays)?how can i latch those 7 segment displays in a single port? is it a latch IC is needed for one 7 segment display?? by using latch, what have to be considered when writing assembly code?

p/s: anyone know what kind of latch IC is easily get in market??

Urgent! expert plz help~~ thanks~~~~~~~

 

You could approach this a number of ways.

1. Don't latch, multiplex. This requires more programming but reduces the hardware needed.

2. Get 3 ea. 8-bit latch IC's and store the segment data in them. You'll have to find a way to address each register separately.

3. Get 3 ea. 8-bit addressable latches. These have only one data input and use three address lines. You'd have to make code to send the segment data one bit at a time.