HD404669 Datasheet, PDF (33/142 Pages) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

HD404669 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
STOPC
SBY
Interrupt
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
Watch mode
(TMA3 = 1, LSON = 0)
f_OSC:
f_X:
ø _CPU :
ø _CLK :
ø _PER :
Stop
Oscillate
Stop
f_W
Stop
*2
f_OSC:
f_X:
f_cyc:
f_SUB:
f_W:
Main oscillation frequency
Suboscillation frequency
Subactive
mode
*1
for time-base
f_OSC/4, f_OSC/8, f_OSC/16 or
f_OSC/32 (selected by software)
f_X/8 or f_X/4
(software selectable)
f_OSC:
f_X:
ø _CPU :
ø _CLK :
Stop
Oscillate
f_SUB
f_W
f_X/8
ø _PER : f_SUB
STOP
*3
INT₀,
timer A
(TMA3 = 1, LSON = 1)
f_OSC:
f_X:
ø _CPU :
ø _CLK :
ø _PER :
Stop
Oscillate
Stop
f_W
Stop
ø _CPU : System clock
ø _CLK : Clock for time-base
ø _PER : Peripheral functions clock
LSON: Low speed on flag
Notes: 1. STOP/SBY (DTON = 1, LSON = 0)
2. STOP/SBY (DTON = 0, LSON = 0)
DTON: Direct transfer on flag
3. STOP/SBY (DTON = Don’t care, LSON = 1)
Figure 14 MCU Status Transitions
33