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Hitachi H8/300L Series Manual page 51

Single-chip microcomputer
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Low Power Modes
Subsleep Mode
In subsleep mode the on-chip peripheral modules operate based on the subclock. Subsleep
mode differs from subactive mode in that the CPU is stopped in subsleep mode.
Watch Mode
In watch mode, a subset of the on-chip peripheral modules operate based on the subclock.
Standby Mode
In standby mode the CPU and all the on-chip peripheral modules are stopped. In this mode the
IC's current drain is reduced to its lowest level, only a few µA. The contents of the on-chip
RAM can be maintained by applying the specified data retention voltage to the IC.
51

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