r5s72060w200fpv Renesas Electronics Corporation., r5s72060w200fpv Datasheet - Page 110

• Manufacturer Part Number: r5s72060w200fpv
• Description: 32-bit Risc Microcomputer Superhtm Risc Engine Family / Sh7200 Series
• Manufacturer: Renesas Electronics Corporation.

Section 3 Clock Pulse Generator (CPG)
3.6.3
Since various characteristics related to the resonator are closely linked to the user’s board design,
thorough evaluation is necessary on the user’s part, using the resonator connection examples
shown in this section as a guide. As the parameters for the oscillation circuit will depend on the
floating capacitance of the resonator and the user board, the parameters should be determined in
consultation with the resonator manufacturer. The design must ensure that a voltage exceeding the
maximum rating is not applied to the resonator pin.
3.6.4
A multilayer ceramic capacitor should be inserted for each pair of Vss and Vcc as a bypass
capacitor as many as possible. The bypass capacitor must be inserted as close to the power supply
pins of the LSI as possible. Note that the capacitance and frequency characteristics of the bypass
capacitor must be appropriate for the operating frequency of the LSI.
3.6.5
In the PLLVcc and PLLVss connection pattern for the PLL, signal lines from the board power
supply pins must be as short as possible and pattern width must be as wide as possible to reduce
inductive interference.
In clock operating mode 7, the EXTAL pin is pulled up and the XTAL pin is left open.
Since the analog power supply pins of the PLL are sensitive to the noise, the system may
malfunction due to inductive interference at the other power supply pins. To prevent such
malfunction, the analog power supply pin Vcc and digital power supply pin PVcc should not
supply the same resources on the board if at all possible.
Rev. 2.00 Dec. 09, 2005 Page 86 of 1152
REJ09B0191-0200
Note on Resonator
Note on Bypass Capacitor
Note on Using a PLL Oscillation Circuit
Figure 3.4 Note on Using a PLL Oscillation Circuit
PLLVcc
PLLVss
Signal lines prohibited
Vcc
Vss
Power supply