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QWhat is the purpose of the memory refresh register in Z80?

ID: #10465 Embedded System 112 views
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#10465Q ID
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Embedded SystemTopic
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  • A To control on-chip DRAM ✔ ✖
  • B To control on-chip SRAM ✔ ✖
  • C To control ROM ✔ ✖
  • D To clear cache ✔ ✖
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In addition to the general purpose registers, stack pointer, program counter, and two index registers, Z80 also has an on-chip refresh circuitry for DRAMs. This circuitry is controlled by the memory refresh register, which generates the necessary refresh signals to keep the data in DRAMs from fading away.

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