Name the three types of bus which are used when external memory is connected to the 8051.( )
A: Address bus
B: Control bus
C: Data bus
D: Enable bus
A: Address bus
B: Control bus
C: Data bus
D: Enable bus
举一反三
- The 89C51 extension parallel three bus refers to the address bus, the data bus and
- 6. 计算机总线按照功能可分为？ A: 地址总线（Address Bus） B: 数据总线（Data Bus） C: 控制总线（Control Bus） D: 系统总线（System Bus）
- which address signals are used to generate the chip select signal of the memory chip for the one-to-one mapping of the memory chip to the logical storage space of the computer system? A: some of the high-order address signals of the address bus B: the lower-order address signals of the address bus C: all remaining high-order address signals of the address bus D: One of the remaining high-order address signals of the address bus
- The width of address bus determines __________. A: word size B: maximum memory capacity of system C: carry data D: control signal
- In Verilog HDL, which option is the correct interpretation of the following statement? assign bus [7:4] = {bus [0], bus [1], bus[2], bus[3] } ; A: bus[0], bus[1], bus[2] and bus[3] are assigned to bus[4], bus[5], bus[6] and bus[7] respectively B: bus[0], bus[1], bus[2] and bus[3] are assigned to bus[7], bus[6], bus[5] and bus[4] respectively C: The values of bus[0], bus[1], bus[2] and bus[3] remain unchanged D: All the values of bus[0], bus[1], bus[2] and bus[3] become binary 0