R0K572115S000BE Renesas Electronics America, R0K572115S000BE Datasheet - Page 685

Manufacturer Part Number

R0K572115S000BE

KIT STARTER FOR SH7211

Manufacturer

Renesas Electronics America

Renesas Starter Kits (RSK)r

Microcontrollerr

CPU Board, LCD Display Module, E8 Emulator, Cable, QuickStart Guide and CD-ROM

For Use With/related Products

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

To change the frequency used by the PLL, use the WDT. When changing the frequency only by

switching the divider, do not use the WDT.

1. Before changing the frequency, always clear the TME bit in WTCSR to 0. When the TME bit

2. Set the type of count clock used in the CKS[2:0] bits in WTCSR and the initial value of the

3. When the frequency control register (FRQCR) is written to, this LSI stops temporarily. The

4. When the WDT count overflows, the CPG resumes supplying the clock and this LSI resumes

5. The counter stops at the value of H'00.

6. Before changing WTCNT after execution of the frequency change instruction, always confirm

is 1, an erroneous reset or interval timer interrupt may be generated when the count overflows.

counter in WTCNT. These values should ensure that the time till count overflow is longer than

the clock oscillation settling time.

WDT starts counting.

operation. The WOVF flag in WRCSR is not set when this happens.

that the value of WTCNT is H'00 by reading from WTCNT.

Changing the Frequency

Rev. 3.00 Mar. 04, 2009 Page 659 of 1168

REJ09B0344-0300