R5S72011 RENESAS [Renesas Technology Corp], R5S72011 Datasheet - Page 118
![no-image](/images/no-image-200.jpg)
R5S72011
Manufacturer Part Number
R5S72011
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.R5S72011.pdf
(1196 pages)
- Current page: 118 of 1196
- Download datasheet (8Mb)
Section 4 Clock Pulse Generator (CPG)
4.6.4
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 3, 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 the digital power supply pins VccR and PVcc
should not supply the same resources on the board if at all possible.
4.6.5
If the multiplication rate is changed by the frequency control register (FRQCR) during transfer by
the DMAC, the DMAC stops its operation without waiting for the completion of the transfer.
Thus, the DMA transfer is not guaranteed. Therefore, when changing the multiplication rate with
the frequency control register (FRQCR), wait for the completion of the DMA transfer or stop the
DMA transfer to change the setting of the frequency control register (FRQCR).
Rev. 2.00 Sep. 07, 2007 Page 90 of 1164
REJ09B0321-0200
Note on Using a PLL Oscillation Circuit
Note on Changing the Multiplication Rate
Figure 4.4 Note on Using PLL Oscillation Circuit
PLLVcc
PLLVss
Signal lines prohibited
Vcc
Vss
Power supply
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