E202075_HD404889 Datasheet, PDF (54/202 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
Standby mode
fosc : Active
fx : Active
øCPU : Stop
øCLK : fcyc
øPER : fcyc
fosc : Active
fx : Active
øCPU : Stop
øCLK : fw
øPER : fcyc
Reset by
RESET pin
input or
watchdog timer
Reset
Active mode
WU0
to
WU3
Stop mode
(TMA3=0,SSR3=0,LSON=0)
fosc : Stop
fx : Active
øCPU : Stop
øCLK : Stop
øPER : Stop
SBY
instruction
interrupt
fosc
fx
øCPU
øCLK
øPER
: Active
: Active
: fcyc
: fcyc
: fcyc
(TMA3=0)
STOP (TMA3=0,SSR3=1,LSON=0)
instruction
fosc : Stop
WU0 to WU3
fx : Stop
øCPU : Stop
øCLK : Stop
STOP
instruction
øPER : Stop
SBY
instruction
interrupt
(TMA3=1)
fosc
fx
øCPU
øCLK
øPER
: Active
: Active
: fcyc
: fw
: fcyc
*4
Subactive mode
fosc : Stop
*1
fx : Active
øCPU : fSUB
øCLK : fw
øPER : fSUB
Timer A, WU0~WU3
or INT0 interrupt
STOP
instruction
*2
STOP
*3
instruction
Timer A, WU0 to WU3
or INT0 interrupt
Watch mode
fosc : Main oscillator frequency
fx : Sub-oscillator frequency
(for realtime clock)
fcyc : fOSC/32 or fOSC/4 (selected by
software)
fw : fx/8
fSUB : fx/8 or fx/4 (selected by software)
øCPU : System clock
øCLK : Clock for realtime clock
øPER : Peripheral function clock
LSON : Low speed on flag
DTON : Direct transfer on flag
TMA3 : Timer mode register A bit3
fosc : Stop
fx : Active
øCPU : Stop
øCLK : fw
øPER : Stop
(TMA3=1,LSON=0)
Transition Condition
*1 STOP/SBY instruction
*2 STOP/SBY instruction
*3 STOP/SBY instruction
*4 STOP/SBY instruction
fosc : Stop
fx : Active
øCPU : Stop
øCLK : fw
øPER : Stop
(TMA3=1,LSON=1)
DTON LSON
1
0
0
0
Don’t care 1
0
0
TMA3
1
1
1
0
Figure 13 MCU Status Transitions
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