HD404818 Datasheet, PDF (30/100 Pages) Hitachi Semiconductor – 16-digit LCD driver

HD404818 Series
Reset
Standby mode
Active mode
f _OSC :
f _X:
ø _CPU:
ø _CLK:
ø _PER:
Operating
Operating
Stopped
f _cyc
f _cyc
(TMA3 = 0)
SBY (standby)
Interrupt
Timers A, B, C
Serial,
INT₀, INT₁
f _OSC :
f _X:
ø _CPU:
ø _CLK:
ø _PER:
Operating
Operating
f _cyc
f _cyc
f _cyc
STOP
Stop mode
(TMA3 = 0)
f _OSC :
f _X:
ø _CPU:
ø _CLK:
ø _PER:
Stopped
Operating
Stopped
Stopped
Stopped
Watch mode
f _OSC :
f _X:
ø _CPU:
ø _CLK:
ø _PER:
Operating
Operating
Stopped
f _SUB
f _cyc
(TMA3 = 1)
SBY (standby)
Interrupt
Timers A, B, C
f _OSC :
f _X:
ø _CPU:
ø _CLK:
ø _PER:
Operating
Operating
f _cyc
f _SUB
f _cyc
Serial,
INT₀, INT₁
*2
STOP
INT₀ ,
Timer
A^*1
(TMA3 = 1, LSON = 0)
f _OSC :
f _X:
ø _CPU:
ø _CLK:
ø _PER:
Stopped
Operating
Stopped
f_SUB
Stopped
*3
f _OSC: Main oscillation frequency
f _X : Suboscillation frequency
for time-base
f _cyc : f_OSC /4
f _SUB : f_X /8
ø _CPU: System clock
ø _CLK : Clock for time-base
ø _PER : Clock for other
peripheral functions
LSON: Low speed on flag
DTON: Direct transfer on flag
Subactive mode
f _OSC :
f _X:
ø _CPU:
ø _CLK:
ø _PER:
Stopped
Operating
f _SUB
f _SUB
f _SUB
STOP
INT₀ ,
Timer
A^*1
STOP/SBY
(LSON = 1)^*4
(TMA3 = 1, LSON = 1)
f _OSC :
f _X:
ø _CPU:
ø _CLK:
ø _PER:
Stopped
Operating
Stopped
f_SUB
Stopped
Notes: 1. Time-base interrupt
2. STOP/SBY (DTON = 1, LSON = 0)
3. STOP/SBY (DTON = 0, LSON = 0)
4. DTON is not affected
Figure 9 MCU Status Transitions
Active Mode: The MCU operates according to the clock generated by the system oscillators OSC₁ and
OSC₂.
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
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