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Op code maps – Zilog Z8F0130 User Manual

Page 273

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eZ8

CPU Core

User Manual

UM012820-0810

Op Code Maps

258

Op Code Maps

Figure 19

displays Op Code map cell description and

Table 25

provides

the abbreviations displayed in

Figure 20

and

Figure 21

. Whenever a

branch occurs, the pipeline is flushed. It takes one extra cycle to flush the
pipeline. After the flush, no bytes are prefetched.

Figure 19. Op Code Map Cell Description

CP

3.3

R2,R1

A

4

Op Code

Lower Nibble

Second Operand

After Assembly

First Operand

After Assembly

Op Code

Upper Nibble

Instruction Cycles

Fetch Cycles