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(f) Operating Clock Frequency Inquiry
The boot program will return the number of operating clock frequencies, and the maximum and
minimum values.
Command
H'23
• Command, H'23, (one byte): Inquiry regarding operating clock frequencies
Response
H'33
Minimum value of
operating clock frequency
···
SUM
• Response, H'33, (one byte): Response to operating clock frequency inquiry
• Size (one byte): The number of bytes that represents the minimum values, maximum
values, and the number of frequencies.
• Number of operating clock frequencies (one byte): The number of supported operating
clock frequency types
(e.g. when there are two operating clock frequency types, which are the main and
peripheral clocks, the number of types will be 2.)
• Minimum value of operating clock frequency (two bytes): The minimum value of the
multiplied or divided clock frequency.
The minimum and maximum values represent the values in MHz, valid to the hundredths
place of MHz, and multiplied by 100. (e.g. when the value is 20.00 MHz, it will be 2000,
which is H'07D0.)
• Maximum value (two bytes): Maximum value among the multiplied or divided clock
frequencies
There are as many pairs of minimum and maximum values as there are operating clock
frequencies.
• SUM (one byte): Checksum
(g) User Boot MAT Information Inquiry
The boot program will return the number of user boot MATs and their addresses.
Command
H'24
• Command, H'24, (one byte): Inquiry regarding user boot MAT information
Size
Number of operating
clock frequencies
Maximum value of operating clock
frequency
Rev. 1.00, 09/03, page 591 of 704
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