4/9/2023 0 Comments Counters in logicworks![]() Ring counter A serial shift register with feedback from the output of the last flip-flop to the input of the first. ![]() (Right is defined in MAX PLUS II as toward the LSB.) Right shift A movement of data from the left to the right in a shift register. Recycle To make a transition from the last state of the count sequence to the first state. Presettable counter A counter with a parallel load function. When a car enters the lot, the driver takes a ticket from a dispenser which also produces a pulse for each ticket taken. ![]() Problem numbers set in color indicate more difficult problems those with underlines indicate most difficult problems.ĩ.1 A parking lot at a football stadium is monitored before a game to determine whether or not there is available space for more cars. UP counter A counter with an ascending sequence. Present state The current state of flip-flop outputs in a synchronous sequential circuit. Parallel transfer Movement of data into all flip-flops of a shift register at the same time. Parallel-load shift register A shift register that can be preset to any value by directly loading a binary number into its internal flip-flops. Parallel loading can be synchronous or asynchronous. Parallel load A function that allows simultaneous loading of binary values into all flip-flops of a synchronous circuit. Next state The desired future state of flip-flop outputs in a synchronous sequential circuit after the next clock pulse is applied. ![]() Modulus The number of states through which a counter sequences before repeating. Modulo- n (or mod- n ) counter A counter with a modulus of n. Memory section A set of flip-flops in a synchronous circuit that hold its present state. Maximum modulus (m max ) The largest number of counter states that can be represented by n bits (m max 2 n ) (Left is defined in MAX PLUS II as toward the MSB.) Left shift A movement of data from the right to the left in a shift register. Johnson counter A serial shift register with complemented feedback from the output of the last flip-flop to the input of the first. GENERIC A clause in the entity declaration of a VHDL component that lists the parameters that can be specified when the component is instantiated. Notes for Part I 1.Count sequence The specific series of output states through which a counter progresses.Ĭounter A sequential digital circuit whose output progresses in a predictable repeating pattern, advancing by one state for each clock pulse.Ĭount-sequence table A list of counter states in the order of the count sequence.ĭataflow design A VHDL design technique that uses Boolean equations to define relationships between inputs and outputs.ĭOWN counter A counter with a descending sequence.Įxcitation table A table showing the required input conditions for every possible transition of a flip-flop output.įull-sequence counter A counter whose modulus is the same as its maximum modulus ( m 2 n for an n-bit counter). cct file to Canvas.Īppendix 10 P т 2 CLK RCO is OD 11 LOAD х 13 input I 0 X 2 LOAD 14 CLR 1 6 0 1 I. You need to show the 8-bit counter outputs of H, G, F, E, D, C, B, A (in this specific order) on the simulation (Screenshot of your simulation make sure it covers the subsequent states mentioned before) Simulation day: (10 pts) You'll need to show the simulation to TA (Thursday, November 19 at 6-8 pm, on my (Dewi's) office hours zoom link) or Upload your. (5pts) A Simulation plot that covers the subsequence of states. (5pts) A Circuit plot of the counter (Screenshot of your complete circuit). In your reports, please include the following materials: (check report template, everything is there you just need to fill it in) a. cct file and your report to canvas by the due date. Results, Report, and Simulations (20 pts) You need to upload your. All devices are available in the build-in libraries of Logic Works, and default device parameters should be used. Binary switches can be used to provide any needed fixed inputs. For each of the 2 digits, the counting result (state of counter) is to be displayed by a 74_49 and a 7-segment display (7-Seg Disp), e.g., as shown below: 49 dot gr BI G12 F 13 E De و دادا داد Alin 111.Refer to the corresponding lecture notes for setting a cutoff limit of 74 163. For each of the 2 digits, a cutoff limit of 9 should be set for the counter (which effectively turns the counter into a binary coded decimal (BCD) counter). to be used for counting tens digit and units digit, respectively. ![]() The 2 counters should be in a cascade fashion, i.e. Procedure By understanding the functionality of 74 163 counter that is introduced in one of the recent lectures in this course (block diagram & function table are in the corresponding lecture notes), use two 74_163 counters to implement the 5-87 counter. , 86, 87 and repeats the cycle) by using 2 of 74_163 counters in Logic Works. Objective To implement a 5-87 counter (counts 5, 6. Part 1: Implement a 5-87 counter (20 pts) I. ![]()
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