Zilog Z8F0130 Manual do Utilizador descarregar pdf (Página 50)

100

101

eZ8

™

CPU Core

User Manual

UM012820-0810 Addressing Modes

Extended register addressing, symbol R, is used to directly access any

methodology.

The 12-bit address is supplied in the operands. There are two types of

extended mode instructions: Register to Register operations and

Immediate to Register operations. Figure 8 displays Register addressing

using 12-bit addresses.

Figure 8. Register Addressing Using 12-Bit Addresses

Two 12-bit

Program Memory

Addresses

(dst, src)

Three Operand

Instruction

(Example)

Op Code

src[11:4]

{src[3:0},

dst[11:8]}

dst[7:0]

Source

Destination

12-bit address is

dst[11:0]

12-bit address is

src[11:0]

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 313 314

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