Fujitsu F2MC-8L F202RA, Руководство по оборудованию, Страница: 36 / 436

20
CHAPTER 2 HANDLING DEVICES
Figure 2.1-1 Operation Sequences after Power-on Reset between Product Types
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.
O s cill a tion s t ab iliz a tion
w a it time (2
1 8
/F
CH
)
Power su pply (V
CC
)
S tep-down circ u it s t ab iliz a tion time (2
17
/F
CH
) +
O s cill a tion s t ab iliz a tion w a it time (2
1 8
/F
CH
)
CPU oper a tion of
prod u ct with a s tep-down
circ u it (MB 8 9F202/F202RA)
CPU oper a tion of
prod u ct witho u t a
s tep-down circ u it
(MB 8 9202 a nd MB 8 9V201)
S t a rt of CPU oper a tion of
prod u ct witho u t a s tep-down
circ u it (re s et vector)
S t a rt of the CPU oper a tion of
prod u ct with a s tep-down
circ u it (re s et vector)
F
CH
: M a in o s cill a tion fre qu ency