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R5F2L3ACBNFP Datasheet(PDF) 189 Page - Renesas Technology Corp |
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R5F2L3ACBNFP Datasheet(HTML) 189 Page - Renesas Technology Corp |
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189 / 848 page  REJ09B0441-0010 Rev.0.10 Jul 30, 2008 Page 153 of 809 Under development Preliminary specification Specifications in this manual are tentative and subject to change. 10. Power Control R8C/L35A Group, R8C/L36A Group, R8C/L38A Group, R8C/L3AA Group, R8C/L35B Group, R8C/L36B Group, R8C/L38B Group, R8C/L3AB Group 10.3 Standard Operating Mode Table 10.2 lists the Clock Selection in Standard Operating Mode. In standard operating mode, the CPU and peripheral function clocks are supplied to operate the CPU and the peripheral functions. Power control is enabled by controlling the CPU clock frequency. The higher the CPU clock frequency, the more processing power increases. The lower the CPU clock frequency, the more power consumption decreases. If unnecessary oscillator circuits stop, power consumption is further reduced. Before the clock sources for the CPU clock can be switched over, the new clock source needs to be oscillating and stable. If the new clock source is the XIN clock or XCIN clock, allow sufficient wait time in a program until oscillation stabilizes before the MCU exits. −: Indicates that either 0 or 1 can be set. Table 10.2 Clock Selection in Standard Operating Mode Modes OCD Register CM1 Register CM0 Register FRA0 Register OCD2 CM17 CM16 CM14 CM13 CM07 CM06 CM05 CM04 CM03 FRA01 FRA00 High-speed clock mode No division 0 0 0 − 1 000 −− − − Divide-by-2 0 0 1 − 1 000 −− − − Divide-by-4 0 1 0 − 1 000 −− − − Divide-by-8 0 −− − 1 010 −− − − Divide-by-16 0 1 1 − 1 000 −− − − Low-speed clock mode No division − 00 −− 10 − 00 −− Divide-by-2 − 01 −− 10 − 00 −− Divide-by-4 − 10 −− 10 − 00 −− Divide-by-8 −− − − − 11 − 00 −− Divide-by-16 − 11 −− 10 − 00 −− High-speed on-chip oscillator mode No division 1 0 0 −− 00 −− − 11 Divide-by-2 1 0 1 −− 00 −− − 11 Divide-by-4 1 1 0 −− 00 −− − 11 Divide-by-8 1 −− −− 01 −− − 11 Divide-by-16 1 1 1 −− 00 −− − 11 Low-speed on-chip oscillator mode No division 1 0 0 0 − 00 −− − 0 − Divide-by-2 1 0 1 0 − 00 −− − 0 − Divide-by-4 1 1 0 0 − 00 −− − 0 − Divide-by-8 1 −− 0 − 01 −− − 0 − Divide-by-16 − 110 − 00 −− − 0 − |
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