Use the method of Examples 3 22 and 3 23 to determine the input conditions needed to activate the output of the circuit in Figure 3 37(b) Figure 3 37b Data from example 3 22 The logic circuit in Figure 3 39 generates an output, MEM, that is used to activate the memory ICs in a particular microcompu...

Use the method of Examples 3-22 and 3-23 to determine the input conditions needed to activate the

Question:

Use the method of Examples 3-22 and 3-23 to determine the input conditions needed to activate the output of the circuit in Figure 3-37(b).

Figure 3-37b

A B C D 1 2 (b) N ALARM

Data from example 3-22

The logic circuit in Figure 3-39 generates an output, MEM, that is used to activate the memory ICs in a particular microcomputer. Determine theinput conditions necessary to activate MEM.

Figure 3-39

RD ROM-A ROM-B RAM X W MEM

Data from example 3-23

The logic circuit in Figure 3-40 is used to enable the liquid crystal display (LCD) of a handheld electronic device when the microcontroller is sending data to or receiving data from the LCD controller. The circuit will enable the display when LCD = 1. Determine the input conditions necessary to enable the LCD.

A A A3 A4 As A6 A7 A IN OUT 74HC30 74HC02 W X Note: All gates are CMOS. 74HC32 74HC02 LCD