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H8/3022 Datasheet(PDF) 72 Page - Renesas Technology Corp |
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H8/3022 Datasheet(HTML) 72 Page - Renesas Technology Corp |
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72 / 712 page  2. CPU Rev.2.00 Mar. 22, 2007 Page 48 of 684 REJ09B0352-0200 2.8 Processing States 2.8.1 Overview The H8/300H CPU has four processing states: the program execution state, exception-handling state, power-down state, and reset state. The power-down state includes sleep mode, software standby mode, and hardware standby mode. Figure 2.11 classifies the processing states. Figure 2.13 indicates the state transitions. Processing states Program execution state Reset state Power-down state The CPU executes program instructions in sequence A transient state in which the CPU executes a hardware sequence (saving PC and CCR, fetching a vector, etc.) in response to a reset, interrupt, or other exception The CPU and all on-chip supporting modules are initialized and halted The CPU is halted to conserve power Sleep mode Software standby mode Hardware standby mode Exception-handling state Figure 2.11 Processing States |
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