Single-Chip Microcontrollers User's Manual

CHAPTER 11 INSTRUCTION SET
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User’s Manual U10676EJ3V0UM
(4) Explanation of machine cycle field
S indicates the number of machine cycles required for an instruction with skip to execute the skip operation.
The value of S varies as follows.
• When skip is executed .............................................................................. S = 0
• When 1- or 2-byte instruction is skipped ................................................. S = 1
• When 3-byte instruction
Note
is skipped.................................................... S = 2
Note 3-byte instructions: BR !addr, BRA !addr1, CALL !addr, CALLA !addr1
Caution The GETI instruction is skipped in one machine cycle.
One machine cycle is equal to one cycle of CPU clock Φ (= t
CY), and four times can be set by PCC (refer to
Figure 6-15 Processor Clock Control Register Format).