SH7751 Datasheet, PDF (386/1224 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

10. Clock Oscillation Circuits
When Using a PLL Oscillator Circuit: Separate VDD−CPG and VSS−CPG from the other VDD
and VSS lines at the board power supply source, and insert resistors RCB and RB, and decoupling
capacitors CPB and CB, close to the pins.
VDD-PLL1
VSS-PLL1
SH7751
SH7751R
VDD-PLL2
VSS-PLL2
RCB1
CPB1
RCB2
CPB2
Recommended values
RCB1 = RCB2 = 10 Ω
CPB1 = CPB2 = 10 μF
RB = 10 Ω
CB = 10 μF
Power Supply
(VDD)
VDD-CPG
VSS-CPG
RB
CB
Power Supply
(VDDQ)
Figure 10.5 Points for Attention when Using PLL Oscillator Circuit
Rev.4.00 Oct. 10, 2008 Page 288 of 1122
REJ09B0370-0400