| 전자부품 데이터시트 검색엔진 |
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M32C/86 데이터시트(PDF) 480 Page - Renesas Technology Corp |
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M32C/86 데이터시트(HTML) 480 Page - Renesas Technology Corp |
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480 / 505 page ![]() Page 457 9 7 4 f o 5 0 0 2 , 8 0 . p e S 0 0 . 1 . v e R 0 0 1 0 - 4 0 2 0 B 9 0 J E R ) T 6 8 / C 2 3 M , 6 8 / C 2 3 M ( p u o r G 6 8 / C 2 3 M 27.5.3 PLL Frequency Synthesizer Stabilize supply voltage to meet the power supply standard when using the PLL frequency synthesizer. Table 27.3 Power Supply Ripple 27. Precautions (Clock Generation Circuit) Figure 27.2 Power Supply Fluctuation Timing 27.5.4 External Clock Do not stop an external clock running if the main clock is selected as the CPU clock while the external clock is applied to the XIN pin. Do not set the CM05 bit in the CM0 register to "1" (main clock stopped) while the external clock input is used for the CPU clock. 27.5.5 Clock Divide Ratio Set the PM12 bit in the PM1 register to "0" (no wait state) when changing the MCD4 to MCD0 bit settings in the MCD register. 27.5.6 Power Consumption Control Stabilize the main clock, sub clock or PLL clock to switch the CPU clock source to each clock. 27.5.6.1 Wait Mode When entering wait mode while the CM02 bit in the CM0 register is set to "1" (peripheral function stop in wait mode), set the MCD4 to MCD0 bits in the MCD register to maintain the 10-MHz CPU clock frequency or less. When entering wait mode, the instruction queue reads ahead to instructions following the WAIT in- struction, and the program stops. Write at least 4 NOP instructions after the WAIT instruction. Vp-p(ripple) f(ripple) VCC f(ripple) Power Supply Ripple Tolerable Frequency (VCC) Vp-p(ripple) Power Supply Ripple Amplitude Voltage l o b m y Sr e t e m a r a P d r a d n a t S t i n U . n i M. p y T. x a M f ) e l p p i r ( V ( y c n e u q e r F e l b a r e l o T e l p p i R y l p p u S r e w o P C C )V 1 C C V 5 =0 1z H k V ) e l p p i r ( P - P e g n a R n o i t a u t c u l F e g a t l o V e l p p i R y l p p u S r e w o PV 1 C C V 5 =5 . 0V V ) | T / V | ( C C e t a R n o i t a u t c u l F e g a t l o V e l p p i R y l p p u S r e w o PV 1 C C V 5 =1 s m / V |
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