Section 3 Oscillator Circuits and Operating Modes
Rev. 2.00 Mar 09, 2006 page 118 of 906
REJ09B0292-0200
•
Modes 0–6
PLL circuits 1 and 2 halted
EXTAL input or crystal resonator used (modes 0–3)
CKIO input (modes 4–6)
FR3
FR2
FR1
FR0
φφφφ
I
φφφφ
E
φφφφ
P
φφφφ
CKIO
0
0
0
0
×
1
×
1/4
×
1/4
×
1/4
×
1
0
1
0
0
×
1
×
1/2
×
1/4
×
1/4
×
1
0
1
0
1
×
1
×
1/2
×
1/2
×
1/4
×
1
0
1
1
0
×
1
×
1/2
×
1/2
×
1/2
×
1
1
0
0
0
×
1
×
1
×
1/4
×
1/4
×
1
1
0
0
1
×
1
×
1
×
1/2
×
1/4
×
1
1
0
1
0
×
1
×
1
×
1/2
×
1/2
×
1
1
1
0
0
×
1
×
1
×
1
×
1/4
×
1
1
1
1
0
×
1
×
1
×
1
×
1/2
×
1
1
1
1
1
×
1
×
1
×
1
×
1
×
1
Note:
Do not use combinations other than those shown above.
Frequency Change:
When PLL circuit 1 or PLL circuit 2 becomes operational after modifying
the frequency modification register (including modification the frequency modification register in
the operating state), access the frequency modification register using the following procedure, and
noting the cautions listed below.
Frequency change procedure
•
Set the on-chip watchdog timer (WDT) overflow time to secure the PLL circuit oscillation
settling time (CKS2–CKS0 bits in WTCSR).
•
Clear the WT/
IT
and TME bit to 0 in WTCSR.
•
Perform a read anywhere in an external memory area 0–4 cache-through area.
•
Change the frequency modification register to the target frequency, or change the
operating/halted state of the PLL circuits 1 and 2 (the clocks will stop temporarily inside the
chip).
•
The oscillation circuits operate, and the clock is supplied to the WDT. This clock increments
the WDT.
•
On WDT overflow, supply of a clock with the frequency set in frequency setting bits FR3–FR0
begins. In this case, the OVF bit in WTSCR and the WOVF bit in RSTCSR are not set, an
interval timer interrupt (ITI) is not requested, and the
WDTOVF
signal is not asserted.
Содержание SH7616
Страница 10: ...Rev 2 00 Mar 09 2006 page x of xxvi ...
Страница 132: ...Section 2 CPU Rev 2 00 Mar 09 2006 page 106 of 906 REJ09B0292 0200 ...
Страница 568: ...Section 12 16 Bit Free Running Timer FRT Rev 2 00 Mar 09 2006 page 542 of 906 REJ09B0292 0200 ...
Страница 582: ...Section 13 Watchdog Timer WDT Rev 2 00 Mar 09 2006 page 556 of 906 REJ09B0292 0200 ...
Страница 662: ...Section 14 Serial Communication Interface with FIFO SCIF Rev 2 00 Mar 09 2006 page 636 of 906 REJ09B0292 0200 ...
Страница 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Страница 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Страница 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Страница 935: ...SH7616 Hardware Manual ...