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H838024 Scheda tecnica(PDF) 99 Page - Renesas Technology Corp |
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H838024 Scheda tecnica(HTML) 99 Page - Renesas Technology Corp |
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99 / 697 page ![]() Section 2 CPU Rev. 7.00 Mar 10, 2005 page 57 of 652 REJ09B0042-0700 Three-state access to on-chip peripheral modules T1 state Bus cycle Internal address bus Internal read signal Internal data bus (read access) Internal write signal Read data Address Internal data bus (write access) T2 state T3 state Write data φ or φSUB Figure 2.13 On-Chip Peripheral Module Access Cycle (3-State Access) 2.7 CPU States 2.7.1 Overview There are four CPU states: the reset state, program execution state, program halt state, and exception-handling state. The program execution state includes active (high-speed or medium- speed) mode and subactive mode. In the program halt state there are a sleep (high-speed or medium-speed) mode, standby mode, watch mode, and sub-sleep mode. These states are shown in figure 2.14. Figure 2.15 shows the state transitions. |
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