
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 CyclesFetch Cycles
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