Renesas M16C/50 Series User Manual page 803

M16C/5L Group, M16C/56 Group
28.5.5 PLL Frequency Synthesizer
To use the PLL frequency synthesizer, stabilize the supply voltage within the acceptable range of power
supply ripple.
Table 28.4 Acceptable Range of Power Supply Ripple
Symbol
f Power supply ripple allowable frequency (VCC)
(ripple)
V Power supply ripple allowable
P-P(ripple)
amplitude voltage
CC(| Δ V / Δ T|)
V Power supply ripple rising/falling
gradient
f(ripple)
Power supply ripple allowable
frequency ( )
VCC
Vp-p(ripple)
Power supply ripple allowable
amplitude voltage
Figure 28.7 Voltage Fluctuation Timing
R01UH0127EJ0110 Rev.1.10
Sep 01, 2011
Parameter
(VCC = 5 V)
(VCC = 3 V)
(VCC = 5 V)
(VCC = 3 V)
VCC
Standard
Min. Typ.
f
(ripple)
28. Usage Notes
Unit
Max.
10 kHz
0.5 V
0.3 V
0.3 V/ms
0.3 V/ms
V
p-p(ripple)
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