HD404374 Datasheet, PDF (45/161 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip A/D Converter

HD404374/HD404384/HD404389/HD404082/HD404084 Series
Standby mode
fosc : Active
fx : Active
CPU : Stop
CLK : fcyc
PER : fcyc
fosc : Active
fx : Active
CPU : Stop
CLK : fw
PER : fcyc
Reset by
pin
input or
watchdog timer
Reset
Active mode
Stop mode
(TMA3=0,SSR3=0,LSON=0)
fosc : Stop
fx : Active
CPU : Stop
CLK : Stop
PER : Stop
0
SBY
instruction
interrupt
fosc
fx
CPU
CLK
PER
: Active
: Active
: fcyc
: fcyc
: fcyc
(TMA3=0)
STOP (TMA3=0,SSR3=1,LSON=0)
instruction
fosc : Stop
fx : Stop
0
CPU : Stop
CLK : Stop
STOP
instruction^*5
PER : Stop
SBY
instruction
interrupt
(TMA3=1)
fosc
fx
CPU
CLK
PER
: Active
: Active
: fcyc
: fw
: fcyc
*4
Subactive mode
fosc : Stop
*1
fx : Active
CPU : fSUB
CLK : fw
PER : fSUB
Timer A, 0
or 0 interrupt
STOP
instruction
*2
STOP
*3
instruction
Timer A, 0
or 0 interrupt
Watch mode
fosc :
fx :
fcyc :
fw :
fSUB :
CPU :
CLK :
PER :
LSON :
DTON :
TMA3 :
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
CPU : Stop
CLK : fw
PER : Stop
(TMA3=1,LSON=0)
fosc : Stop
fx : Active
CPU : Stop
CLK : fw
PER : 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 HD404384, HD404389, HD404082,
and HD404084 Series.
Note: Watch mode and subactive mode apply to HD404374 Series.
Figure 11 MCU Status Transitions
Rev.5.00, Sep.11.2003, page 45 of 161