SH7144 Datasheet, PDF(661/773 Page) Renesas Technology Corp – Hitachi SuperH RISC engine

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SH7144 Datasheet, PDF (661/773 Pages) Renesas Technology Corp – Hitachi SuperH RISC engine

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Section 24 Power-Down Modes

In addition to the normal program execution state, this LSI has three power-down modes in which

operation of the CPU and oscillator is halted and power dissipation is reduced. Low-power

operation can be achieved by individually controlling the CPU, on-chip peripheral functions, and

so on.

This LSI's power-down modes are as follows:

â¢ Sleep mode

â¢ Software standby mode

â¢ Module standby mode

Sleep mode indicates the state of the CPU, and module standby mode indicates the state of the on-

chip peripheral function (including the bus master other than the CPU). Some of these states can

be combined.

After a reset, the LSI is in normal-operation mode.

Table 24.1 lists internal operation states in each mode.

LPWSH21A_000120020700

Rev. 2.0, 09/02, page 621 of 732

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