Renesas H8S/2319 series Hardware Manual page 769

(6) 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, (1 byte): Inquiry regarding operating clock frequencies
Response H'33
The minimum value of
operating clock frequency
···
SUM
• Response, H'33, (1 byte): Response to operating clock frequency inquiry
• Size (1 byte): The number of bytes that represents the minimum values, maximum values, and
the number of types.
• A number of types (1 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 H'02.)
• Minimum value of operating clock frequency (2 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 D'2000 and
H'07D0.)
• Maximum value (2 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 (1 byte): Checksum
(7) 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, (1 byte): Inquiry regarding user boot MAT information
Size A number of operating
clock frequencies
The maximum value of operating clock
frequency
Rev. 5.00, 12/03, page 739 of 1088