Section A Question A1. (COMPULSORY) Figure A1.1 Microprocessor Data Sheet MICROPROCESSOR READ CYCLE TIMING DIAGRAM Time Point PPPPPPPPPPMPPPPPPPPPP Address A0-A7 A0-A7 Address/Data ADO-AD7 A8- A15 ALE CSn otRD MICROPROCESSOR WRITE CYCLE TIMING DIAGRAM Address A0-A7 A0-A7 Address/Data ADO-AD7 A8 - A15 DO-D7 ALE notCSn otWR Question 1. Continued.... 57018 Page 2 of 8 Section A Question A1. (COMPULSORY) continued Figure A1.2 Memory Module Data Sheet MEMORY READ CYCLE TIMING DIAGRAM (Mode 1) Address Address Valid notcs Data Out Data Valid Data In notRD MEMORY WRITE CYCLE TIMING DIAGRAM (Mode 1) Address Address Valid otcs Data In Data Valid Data Out otWR Question 1. Continued.. 57018 Page 3 of 8 Section A Question A1. (COMPULSORY) continued LATCH uP a RAM AD, A, D, AD KLM DE Figure A1.3 Microcomputer Circuit Diagram Study the data sheets provided for a microprocessor and a memory module figures A1.1 and A1.2. These devices are to be used in the design ofa computer system. Answer all of the following short questions a) Identify which control signal at what time point could be used to latch a valid memory address from the microprocessor? [2 marks] b) Identify what combination of control signals at what timing point could be used to latch valid data during a microprocessor read cycle? [2 marks] c) Identify what combination of control signals at what timing point could be used to latch valid data during a microprocessor write cycle? [2 marks] d) Identify what combination of control signals at what timing point could be used to latch valid data during a memory module read cycle? [2 marks] e) Identify what combination of control signals at what timing point could be used to latch valid data during a memory module write cycle? [2 marks] Above is a circuit diagram of a microprocessor system. It has only three components; a microprocessor, a memory module and an address latch. The circuit is incomplete f By studying the data sheets provided for a microprocessor and a memory module, figures A1.1 and A1.2, describe the connections necessary to complete the microcomputer circuit diagram, figure A1.3. i.e. 'Connect C to M, this connects an available chip select from the microprocessor to the memory module ensuring it activates only when addressed at the correct position in memory Remember to explain your choice of connection for each connection made. Note also that microprocessor signals may be connected to more [10 marks] than one point in the circuit 57018 Page 4 of 8