Fujitsu F2MC-8L F202RA Hardware Manual page 36

CHAPTER 2 HANDLING DEVICES
Figure 2.1-1 Operation Sequences after Power-on Reset between Product Types
Power supply (V
CPU operation of
product with a step-down
circuit (MB89F202/F202RA)
CPU operation of
product without a
step-down circuit
(MB89202 and MB89V201)
F : Main oscillation frequency
CH
As shown in Figure 2.1-1 , the start of CPU operation of a product with a step-down circuit is slower than
that of the product without a step-down circuit. This is because time is required for the step-down circuit to
stabilize prior to normal operation of the step-down circuit.
20
)
CC
Step-down circuit stabilization time (2
Oscillation stabilization wait time (2
Oscillation stabilization
wait time (2
Start of CPU operation of
product without a step-down
circuit (reset vector)
18
18
/F )
CH
Start of the CPU operation of
product with a step-down
circuit (reset vector)
17
/F ) +
CH
/F )
CH