UPC EETAC Bachelor's Degree in Telecommunications Systems and in Network Engineering EEL

 

BCD counter modulo 60 (seconds or minutes counter)

P7

1. Specifications

Our goal is to design an minute or seconds counter to be used in a real-time clock device. Fig. 1 represents the symbol and function table. It is for counting using BCD code from 00 up to 59.

Symbol

Fig 1. Symbol for the proposed entity.

Let us use our plan C2 to build this Counter_BCD_mod60 chaining and truncating Counter_mod16 blocks. 

 

Additional features and products:

1. Add reversibility to the counter with a new control input UD_L ( '1' up, '0' down)

2. Design the CLK generator to implement a 10 Hz squared waveform from a 50 MHz crystal oscillator.

3. Combine blocks and also the hour_counter to implement a hours, minutes, seconds, tenths of a second (HH:MM:SS:T) real-time clock circuit.