Rev. 3.00 Sep. 27, 2007 Page 738 of 758
REJ09B0243-0300
Item
Page Revision (See Manual for Details)
4.4.1 Frequency Control Register
(FRQCR)
61 Added/Deleted
Before making changes to FRQCR, set the module stop
bit in the standby control register 2, 3, 4, 5, and 6 to 1
and stop clock supply to each module except the CPU,
on-chip ROM, and on-chip-RAM.
Added
Bit Bit
Name
Description
14 to 12 IFC[2:0]
Internal Clock (I
φ
) Frequency Division Ratio
If a prohibited value is specified, subsequent
operation is not guaranteed.
11 to 9
BFC[2:0]
Bus Clock (B
φ
) Frequency Division Ratio
If a prohibited value is specified, subsequent
operation is not guaranteed.
8 to 6
PFC[2:0]
Peripheral Clock (P
φ
) Frequency Division Ratio
If a prohibited value is specified, subsequent
operation is not guaranteed.
2 to 0
MPFC[2:0] MTU2 Clock (MP
φ
) Frequency Division Ratio
If a prohibited value is specified, subsequent
operation is not guaranteed.
4.4.1 Frequency Control Register
(FRQCR)
62,
63
4.5 Changing Frequency
65
Added/Deleted
4. The clock frequencies are immediately changed to
the specified values after FRQCR setting is
completed. After an instruction to rewrite FRQCR
has been issued, the actual clock frequencies will
change after (1 to 24n) cyc + 11Bf + 7Pf.
n: Division ratio specified by the BFC bit in FRQCR
(1, 1/2, 1/4, or 1/8)
cyc: Clock obtained by dividing EXTAL by 8 with the
PLL.
Note: (1 to 24n) depends on the internal state.
Summary of Contents for SH7124 R5F7124
Page 2: ...Rev 3 00 Sep 27 2007 Page ii of xx ...
Page 8: ...Rev 3 00 Sep 27 2007 Page viii of xx ...
Page 36: ...Section 1 Overview Rev 3 00 Sep 27 2007 Page 16 of 758 REJ09B0243 0300 ...
Page 68: ...Section 2 CPU Rev 3 00 Sep 27 2007 Page 48 of 758 REJ09B0243 0300 ...
Page 108: ...Section 5 Exception Handling Rev 3 00 Sep 27 2007 Page 88 of 758 REJ09B0243 0300 ...
Page 166: ...Section 7 User Break Controller UBC Rev 3 00 Sep 27 2007 Page 146 of 758 REJ09B0243 0300 ...
Page 724: ...Section 20 List of Registers Rev 3 00 Sep 27 2007 Page 704 of 758 REJ09B0243 0300 ...
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