Section 17 Flash Memory
Rev. 3.00 Sep. 27, 2007 Page 634 of 758
REJ09B0243-0300
(6) Inquiry on operating frequency
In response to the inquiry on operating frequency, the boot program returns the number of
operating frequencies and the maximum and minimum values.
Command
H'23
Command H'23 (1 byte): Inquiry on operating frequency
Response
H'33
Size
No. of frequency types
Operating freq. (min)
Operating freq. (max)
…
SUM
Response H'33 (1 byte): Response to the inquiry on operating frequency
Size (1 byte): The total length of the number of frequency types, and maximum and
minimum values of operating frequency fields.
Number of frequency types (1 byte): The number of operating clock frequencies required
within the device.
For example, the value two indicates main and peripheral operating clock frequencies.
Minimum value of operating frequency (2 bytes): The minimum frequency of a frequency-
multiplied or -divided clock signal.
The value in this field and in the maximum value field is the frequency in MHz to two
decimal places, multiplied by 100 (for example, if the frequency is 20.00 MHz, the value
multiplied by 100 is 2000, so H'07D0 is returned here).
Maximum value of operating frequency (2 bytes): The maximum frequency of a frequency-
multiplied or -divided clock signal.
As many pairs of minimum values are included as there are frequency types.
SUM (1 byte): Checksum
Summary of Contents for SH7124 R5F7124
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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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