UPD753012GC NEC, UPD753012GC Datasheet - Page 46

• Manufacturer Part Number: UPD753012GC
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER
• Manufacturer: NEC

46
(4) Explanation of number of machine cycles column
S denotes the number of machine cycles required by skip operation when a skip instruction is executed.
The value of S varies as follows.
• When no skip is made: S = 0
• When the skipped instruction is a 1- or 2-byte instruction: S = 1
• When the skipped instruction is a 3-byte instruction
One machine cycle is equal to one cycle of CPU clock
types by setting PCC.
Note 3-byte instruction: BR !addr, BRA !addr1, CALL !addr or CALLA !addr1 instruction
Caution The GETI instruction is skipped in one machine cycle.
Note
: S = 2
(= t
CY
); time can be selected from among four
PD753012, 753016, 753017