M38203M4 Datasheet, PDF (267/344 Pages) Mitsubishi Electric Semiconductor – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPLICATION
2.9 Standby function
2.9.2 Wait mode
The wait mode is set by execution of the WIT instruction. In the wait mode, the oscillation is continued,
but the internal clock φ stops at the “H” level.
Since the oscillation is continued regardless of the CPU stop, the peripheral units operate.
(1) States in the wait mode
By executing the WIT instruction, the wait mode
is set.
In the wait mode, the internal clock φ which is
supplied to the CPU stops at the “H” level. The
continuation of oscillation permits clock supply
to the peripheral units.
Table 2.9.2 shows the state in the wait mode.
Table 2.9.2 State in wait mode
Item
Oscillation
CPU
Internal clock φ
State in wait mode
Operating
Stop
Stop at “H” level
I/O ports P0–P7
The state where WIT in-
struction is executed is held.
Timer, serial I/O,
Operating
LCD display functions,
watchdog timer
3820 GROUP USER’S MANUAL
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