HD404374 Datasheet, PDF (43/161 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip A/D Converter

HD404374/HD404384/HD404389/HD404082/HD404084 Series
Operating Modes
The five operating modes shown in table 19 can be used for the MCU.
The function of each mode is shown in table 20, and the state transition diagram among each mode in
figure 11.
Table 19 Operating Modes and Clock Status
Mode Name
Active
Standby Stop
Watch*¹
Subactive*^1, *³
Activation method
RESET
SBY
cancellation, instruction
interrupt
request, WU₀
input in stop
mode
STOP/SBY
instruction in
subactive
mode (when
direct
transfer is
selected)
STOP
instruction
when
TMA3 = 0
STOP
instruction
when
TMA3 = 1
INT₀/timer A or
WU
0
interrupt
request in watch
mode
Status
System oscillator
OP
OP
Stopped Stopped Stopped
Subsystem oscillator*¹ OP
OP
OP*²
OP
OP
Cancellation method
RESET
input,
STOP/SBY
instruction
RESET
input,
interrupt
request
RESET
input,
WU₀ input
RESET
RESET input,
input,
STOP/SBY
INT₀/timer A instruction
or WU
0
interrupt
request
Notes: OP: implies in operation.
1. Applies to HD404374 Series.
2. Operating or stopping the oscillator can be selected by setting bit 3 of the system clock select
register (SSR: $004)
3. Subactive mode is an optional function; specify it on the fnction option list.
Rev.5.00, Sep.11.2003, page 43 of 161