Relationship Between Cpu Clock And Minimum Instruction Execution Time - NEC PD78076 User Manual

The fastest instruction of the PD78078 and 78078Y Subseries can be executed in two clocks of the CPU clock.
The relationship between the CPU clock (f
Table 7-2. Relationship between CPU Clock and Minimum Instruction Execution Time
CPU Clock (f
f
X
f /2
X
2
f /2
X
f /2 3
X
f /2 4
X
f /2 5
X
f /2
XT
f = 5.0 MHz, f
X
f : Main system clock oscillation frequency
X
f : Subsystem clock oscillation frequency
XT
CHAPTER 7 CLOCK GENERATOR
) and the minimum instruction execution time is shown in Table 7-2.
CPU
) Minimum Instruction Execution Time: 2/f
CPU
0.4 s
0.8 s
1.6 s
3.2 s
6.4 s
12.8 s
122 s
= 32.768 kHz
XT
CPU
169