HD404344R Datasheet, PDF (34/102 Pages) Renesas Technology Corp – 4-bit microcomputer has an A/D converter

HD404344R Series/HD404394 Series
Operating Modes
The MCU has three operating modes as shown in table 14. The transitions between the operating modes are
shown in figure 11.
Table 14 Operations in Each Operating Mode
Function
Active Mode
Standby Mode
Stop Mode
System oscillator
OP
OP
Stopped
CPU
OP
Retained
Reset
RAM
OP
Retained
Retained
Timers B, C
OP
OP
Reset
Serial
OP
OP
Reset
A/D
OP
OP
Reset
I/O
OP
Retained*
Reset
Notes: OP implies in operation.
* Since input/output circuits are in operation, the current will flow in/out depending on the pin status
in standby mode. Note that this current is in addition to the standby mode dissipation current.
SBY
instruction
Active
mode
STOP
instruction
Interrupt
request
Standby
mode
RESET = 0 RESET = 1
Stop
mode
RESET = 0
MCU
reset
RESET = 0
Figure 11 MCU Status Transition
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