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HD6432126RW Datasheet(PDF) 90 Page - Renesas Technology Corp |
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HD6432126RW Datasheet(HTML) 90 Page - Renesas Technology Corp |
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90 / 843 page  66 Figure 2.16 shows the stack after exception handling ends. Note: * Ignored when returning. CCR PC (24 bits) SP CCR CCR* PC (16 bits) SP Normal mode Advanced mode Figure 2.16 Stack Structure after Exception Handling (Examples) 2.8.4 Program Execution State In this state the CPU executes program instructions in sequence. 2.8.5 Bus-Released State This is a state in which the bus has been released in response to a bus request from a bus master other than the CPU. While the bus is released, the CPU halts except for internal operations. There is one other bus master in addition to the CPU: the data transfer controller (DTC). For further details, refer to section 6, Bus Controller. 2.8.6 Power-Down State The power-down state includes both modes in which the CPU stops operating and modes in which the CPU does not stop. There are five modes in which the CPU stops operating: sleep mode, software standby mode, hardware standby mode, subsleep mode, and watch mode. There are also three other power-down modes: medium-speed mode, module stop mode, and subactive mode. In medium-speed mode, the CPU and other bus masters operate on a medium-speed clock. Module stop mode permits halting of the operation of individual modules, other than the CPU. Subactive mode, subsleep mode, and watch mode are power-down modes that use subclock input. For details, refer to section 21, Power-Down State. |
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