Which
of the following devices may be used to de-multiplex the lower
address bus from multiplexed address-data bus of MCS-51?().
A: 74373
B: 74245
C: 74139
D: 74139
of the following devices may be used to de-multiplex the lower
address bus from multiplexed address-data bus of MCS-51?().
A: 74373
B: 74245
C: 74139
D: 74139
举一反三
- 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
- 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 89C51 extension parallel three bus refers to the address bus, the data bus and
- Which of the following types of signals does the data bus transmit? A: Data in memory B: Instructions in memory C: Data of IO devices D: Status of IO devices
- 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）