HD404829R Datasheet, PDF (32/149 Pages) Renesas Technology Corp – AS Microcomputer Incorporating a LCD controller/Driver Circuit

HD404829R Series
Operating Modes
The MCU has five operating modes as shown in table 13. The operations in each mode are listed in tables
14 and 15. Transitions between operating modes are shown in figure 14.
Active Mode: All MCU functions operate according to the clock generated by the system oscillator OSC₁
and OSC₂.
Table 13 Operating Modes and Clock Status
Activation
method
Status
System
oscillator
Active
RESET
cancellation,
interrupt
request,
STOPC
cancellation
in stop mode,
STOP/SBY
instruction in
subactive mode
(when direct
transfer is
selected)
Operating
Standby
SBY
instruction
from active
mode
Operating
Mode Name
Stop
STOP
instruction
when
TMA3 = 0
Stopped
Watch
Subactive^*2
STOP
instruction
when
TMA3 = 1
or SBY
instruction from
subactive mode
(when LSON = 1,
or LSON and
DTON are
both 0)
AN interrupt
request from
timer A or
INT₀ in watch
mode when
LSON = 1
Stopped
Stopped
Subsystem
oscillator
Operating *1
Operating *1 Operating *1 Operating *1
Operating *1
Cancellation
method
RESET input,
STOP/SBY
instruction
RESET input, RESET input,
interrupt
STOPC input
request
in stop mode
RESET input,
INT₀ or timer A
interrupt
request
RESET input,
STOP/SBY
instruction
Notes: 1. Operating or stopping the oscillator can be selected by setting bit 3 of the system clock select
register (SSR: $029).
2. Subactive mode is an optional function; specify it on the function option list.
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