HD404889_03 Datasheet, PDF (54/197 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
Standby mode
fosc : Active
fx : Active
φCPU : Stop
φCLK : fcyc
φPER : fcyc
fosc : Active
fx : Active
φCPU : Stop
φCLK : fw
φPER : fcyc
Reset by
RESET pin
input or
watchdog timer
WU0
Reset
to
WU3
Active mode
Stop mode
(TMA3=0,SSR3=0,LSON=0)
fosc : Stop
fx : Active
φCPU : Stop
φCLK : Stop
φPER : Stop
SBY
instruction
interrupt
fosc
fx
φCPU
φCLK
φPER
: Active
: Active
: fcyc
: fcyc
: fcyc
(TMA3=0)
STOP (TMA3=0,SSR3=1,LSON=0)
instruction
fosc : Stop
WU0 to WU3
fx : Stop
φCPU : Stop
φCLK : Stop
STOP
φPER : Stop
instruction*5
SBY
instruction
interrupt
(TMA3=1)
fosc
fx
φCPU
φCLK
φPER
: Active
: Active
: fcyc
: fw
: fcyc
*4
Subactive mode
fosc : Stop
*1
fx : Active
φCPU : fSUB
φCLK : fw
φPER : fSUB
Timer A, WU0~WU3
or INT0 interrupt
STOP
instruction
*2
STOP
*3
instruction
Timer A, WU0 to WU3
or INT0 interrupt
fosc :
fx :
fcyc :
fw :
fSUB :
φCPU :
φCLK :
φPER :
LSON :
DTON :
TMA3 :
Watch mode
Main oscillator frequency
Sub-oscillator frequency
(for realtime clock)
fOSC/32 or fOSC/4 (selected by
software)
fx/8
fx/8 or fx/4 (selected by software)
System clock
Clock for realtime clock
Peripheral function clock
Low speed on flag
Direct transfer on flag
Timer mode register A bit3
fosc : Stop
fx : Active
φCPU : Stop
φCLK : fw
φPER : Stop
(TMA3=1,LSON=0)
fosc : Stop
fx : Active
φCPU : Stop
φCLK : fw
φPER : Stop
(TMA3=1,LSON=1)
Transition Condition DTON LSON TMA3
*1 STOP/SBY instruction
1
0
1
*2 STOP/SBY instruction
0
0
1
*3 STOP/SBY instruction Don't care 1
1
*4 STOP/SBY instruction
0
0
0
*5 Applies to HD404899, HD404878 and HD404868 Series.
Figure 13 MCU Status Transitions
Rev.6.00, Sep.08.2003, page 54 of 197