answer question (iv)

Q3 A reflected binary code (RBC) is an ordering of the binary numeral system such that two successive values differ in only one bit. The RBC was originally designed to prevent spurious output from electromechanical switches. The RBC corresponding to the first few nonnegative integers are given in the table in Appendix The circuit for representing the integer and its corresponding RBC is shown as in Figure 3.1. X1 Ho DSCCN CSCCUNDUT RAS RAS RAS RAUTDOO CRYSTAL C1 C2 R3 D1 D2 D3 04 4 Figure 3.1 Timer circuit (seven segment display and its corresponding RBC) From the figure, the integer will be displayed by seven segment display (common cathode), and its comesponding RBC is represented by flashing LEDs DI, D2, D3 and D4, Dl represents the most significant digit (MSD) while D4 represents the least significant digit (LSD). In addition, an LED is turned on when HIGH signal is provided. i By using the circuit, you are required to construct one Flowcode program that meets all the following requirements: It can display the value in decrement manner (98+1+6+5+4 + 3 +2+10). Use of macro is not allowed. (9 marks) il The delay time between the values is 500 ms. (3 marks) SULIT iii. (BMCG 2212) SULIT English Version- The display sequence will be reset to value "9' after the dehy time of the value 'O' and the process will be repeated as described in i (3 marks) iv. You have to integrate the 'Switch command when you construct your Fbwcode program