HD404369 Datasheet, PDF (30/117 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer

HD404369 Series
Standby mode
f_OSC:
f_X:
ø _CPU:
ø _CLK:
ø _PER:
Oscillate
Oscillate
Stop
f_cyc
f_cyc
Reset by
RESET input or
by watchdog timer
RAME = 0
RAME = 1
RESET1 RESET2
STOPC
SBY
Interrupt
STOPC
Active
mode
f_OSC:
f_X:
ø _CPU:
ø _CLK:
ø _PER:
Oscillate
Oscillate
f_cyc
f_cyc
f_cyc
(TMA3 = 0)
STOP
STOP
Stop mode
(TMA3 = 0, SSR13 = 0)
f_OSC:
f_X:
ø _CPU:
ø _CLK:
ø _PER:
Stop
Oscillate
Stop
Stop
Stop
(TMA3 = 0, SSR13 = 1)
f_OSC:
f_X:
ø _CPU:
ø _CLK:
ø _PER:
Stop
Stop
Stop
Stop
Stop
f_OSC:
f_X:
ø _CPU:
ø _CLK:
ø _PER:
Oscillate
Oscillate
Stop
f_W
f_cyc
SBY
Interrupt
f_OSC:
f_X:
ø _CPU:
ø _CLK:
ø _PER:
(TMA3 = 1)
Oscillate
Oscillate
f_cyc
f_W
f_cyc
STOP
INT₀,
timer A^*1
Watch mode
(TMA3 = 1, LSON = 0)
f_OSC:
f_X:
ø _CPU:
ø _CLK:
ø _PER:
Stop
Oscillate
Stop
f_W
Stop
f_OSC: Main oscillation frequency
f_X: Suboscillation frequency
for time-base
f_cyc: f_OSC/4, f_OSC/8, f_OSC/16, f_OSC/32
(software selectable)
f_SUB: f_X/8 or f_X/4
(software selectable)
f_W: 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
*2
Subactive
mode
f_OSC:
f_X:
ø _CPU:
ø _CLK:
ø _PER:
Stop
Oscillate
f_SUB
f_W
f_SUB
*3
STOP
*4
INT₀,
timer A^*1
(TMA3 = 1, LSON = 1)
f_OSC:
f_X:
ø _CPU:
ø _CLK:
ø _PER:
Stop
Oscillate
Stop
f_W
Stop
Notes: 1. Interrupt source
2. STOP/SBY (DTON = 1, LSON = 0)
3. STOP/SBY (DTON = 0, LSON = 0)
4. STOP/SBY (DTON = Don’t care, LSON = 1)
Figure 11 MCU Status Transitions
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