Product data

HD404818 Series
28
Reset
f :
f :
:
:
:
CPU
CLK
PER
OSC
X
Operating
Operating
Stopped
f
f
cyc
cyc
f :
f :
:
:
:
CPU
CLK
PER
OSC
X
Operating
Operating
Stopped
f
f
SUB
cyc
f :
f :
:
:
:
CPU
CLK
PER
OSC
X
Operating
Operating
f
f
f
cyc
cyc
cyc
f :
f :
:
:
:
CPU
CLK
PER
OSC
X
Operating
Operating
f
f
f
cyc
SUB
cyc
f :
f :
:
:
:
CPU
CLK
PER
OSC
X
Stopped
Operating
f
f
f
SUB
SUB
SUB
f :
f :
:
:
:
CPU
CLK
PER
OSC
X
Stopped
Operating
Stopped
Stopped
Stopped
f :
f :
:
:
:
CPU
CLK
PER
OSC
X
Stopped
Operating
Stopped
f
Stopped
SUB
f :
f :
:
:
:
CPU
CLK
PER
OSC
X
Stopped
Operating
Stopped
f
Stopped
SUB
Standby mode Stop mode
(TMA3 = 0)
Watch mode
Subactive mode
(TMA3 = 1) (TMA3 = 1, LSON = 0)
(TMA3 = 1, LSON = 1)
(TMA3 = 0)
SBY (standby)
Interrupt
Timers A, B, C
Serial,
INT , INT
0 1
SBY (standby)
Interrupt
STOP
STOP
INT ,
Timer A
0
1
INT ,
Timer A
0
1
STOP
STOP/SBY
(LSON = 1)
4
2
3
1. Time-base interrupt
2. STOP/SBY (DTON = 1, LSON = 0)
3. STOP/SBY (DTON = 0, LSON = 0)
4. DTON is not affected
f :
f :
f :
f :
:
:
:
LSON:
DTON:
cyc
SUB
OSC
X
Main oscillation frequency
Suboscillation frequency
for time-base
f /4
f /8
System clock
Clock for time-base
Clock for other
peripheral functions
Low speed on flag
Direct transfer on flag
OSC
X
CPU
CLK
PER
Active mode
Timers A, B, C
Serial,
INT , INT
0 1
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
Notes:
ø
ø
ø
*
*
*
*
*
Figure 9 MCU Status Transitions
Active Mode: The MCU operates according to the clock generated by the system oscillators OSC
1
and
OSC
2
.
Standby Mode: The MCU enters standby mode when the SBY instruction is executed from active mode.
In this mode, the oscillators, interrupts, timer/counters, and serial interface continue to operate, but all
instruction execution-related clocks stop. The stopping of these clocks stops the CPU, retaining all RAM
and register contents and maintaining the current I/O pin status.
Standby mode is terminated by a RESET input oran interrupt request. If it is terminated by a RESET input,
the MCU is reset as well. After an interrupt request, the MCU enters active mode and resumes, executing