What is the purpose of memory refresh register of Z80?(a) To control on-chip DRAM(b) To control on-chip SRAM(c) To control ROM(d) Toclear cacheThe question was asked in an interview for job.My question is based upon Microprocessor of Embedded System topic in division Embedded System of Embedded Systems

What is the purpose of memory refresh register of Z80?(a) To control o

1.	What is the purpose of memory refresh register of Z80?(a) To control on-chip DRAM(b) To control on-chip SRAM(c) To control ROM(d) Toclear cacheThe question was asked in an interview for job.My question is based upon Microprocessor of Embedded System topic in division Embedded System of Embedded Systems
Answer» Right OPTION is (a) To control on-chip DRAM For explanation I would SAY: In addition to the general purpose registers, a stack pointer, program counter, and two index registers are included in Z80. It was also used in MANY embedded designs because of its high-quality performance and for its in-built refresh circuitry for DRAMs.

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