7470 Datasheet, PDF (32/47 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
7470/7471 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
f(XIN) oscillation
f(XCIN) stop
φ stop
Timer operation
WIT instruction
Interrupt
Reset
CM4 = 0
CM5 = 0
CM6 = 0
CM7 = 0
f(XIN) oscillation
f(XCIN) stop
P50, P51 input
φ = f(XIN)/2
STP instruction
Interrupt (Note 1)
CM5 = 1
CM4 = 1
(Note 2)
CM4 = 0
f(XIN) oscillation
f(XCIN) oscillation
φ stop
Timer operation
WIT instruction
Interrupt
f(XIN) oscillation
f(XCIN) oscillation
φ = f(XIN)/2
STP instruction
Interrupt (Note 1)
(CM5 = 0)
CM7 = 1
CM7 = 0
f(XIN) oscillation
f(XCIN) oscillation
φ stop
Timer operation
WIT instruction
Interrupt
f(XIN) oscillation
f(XCIN) oscillation
φ = f(XCIN)/2
CM5 = 1
STP instruction
Interrupt (Note 1)
f(XIN) stop
f(XCIN) stop
φ stop
f(XIN) stop
f(XCIN) stop
φ stop
f(XIN) stop
f(XCIN) stop
φ stop
f(XIN) stop
f(XCIN) oscillation
φ stop
Timer operation
CM6 = 1
CM6 = 0
(Note 2)
WIT instruction
Interrupt
f(XIN) stop
f(XCIN) oscillation
φ = f(XCIN)/2
CM5 = 1
STP instruction
Interrupt (Note 1)
f(XIN) stop
f(XCIN) stop
φ stop
Notes 1 : Latency time is automatically generated upon release from the STP instruction due to the connections of timer 3
and 4.
2 : When the system clock is switched over by restarting clock oscillation, a certain wait time required for oscillation
to stabilize must be inserted by the program.
Fig. 27 Transition of states for the system clock
31