Zilog Z0840006PSC CPU a 6 bMHz, appartiene alla serie Z80 ed è stato tra i chip più diffusi sia nei personal computer che in elettronica industriale. Alcune caratteristiche in inglese ...

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Zilog Z0840006PSC CPU a 6 bMHz, appartiene alla serie Z80 ed è stato tra i chip più diffusi sia nei personal computer che in elettronica industriale.

Alcune caratteristiche in inglese

Programming features contain 208 bits of read/write memory that are accessible to the programmer. The internal registers include an accumulator and six 8-bit registers that can be paired as three 16-bit registers. In addition to general registers, a 16-bit stack-pointer, 16-bit program-counter, and two 16-bit index registers are provided. 

 

The core has a 16-bit address bus capable of directly accessing 64kB of memory space. It has 252 root instructions with the reserved 4 bytes as prefixes, and accesses an additional 308 instructions.

The microcode-free design was developed for reuse in ASIC and FPGA implementations. It is strictly synchronous, with no internal tri-states and a synchronous reset.

Control Unit

• 8-bit Instruction decoder

Arithmetic-Logic Unit

 

• 8-bit arithmetic and logical operations  Symbol
• 16-bit arithmetic operations 
• Boolean manipulations

 

Register File Unit

• Duplicate set of both general purpose and flag registers
• Two 16-bit index registers

Interrupt Controller

• Three modes of maskable interrupts
• Non maskable interrupt

External Memory interface

• Address up to 64 KB of program memory
• Address up to 64 KB of data memory
• Address up to 64 KB of input/output devices

 

On-core dynamic memory refresh counter

 

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