Renesas H8S Series Hardware Manual page 853

(e) Division Ratio Inquiry
The boot program will return the supported division ratios in response to the division ratio inquiry
command.
Command H'22
• Command, H'22 (1 byte): Inquiry regarding division ratio
Response H'32
Number of division
ratios
···
SUM
• Response, H'32 (1 byte): Response to the division ratio inquiry
• Size (1 byte): The amount of data that represents the number of types, number of division
ratios, and division ratios
• Number of types (1 byte): The number of supported division ratio types
(e.g. H'02 when there are two types: main operating frequency and peripheral module
operating frequency)
• Number of division ratios (1 byte): The number of supported division ratios for each operating
frequency.
The number of division ratios supported in the main module and peripheral modules.
• Division ratio (1 byte)
 Division ratio: The inverse of the division ratio, i.e. a negative number (e.g. when the clock
is divided by two, the value will be H'FE[−2])
The number of division ratios returned is the same as the number of division ratios and as
many groups of data are returned as there are types.
• SUM (1 byte): Checksum
Section 21 Flash Memory (0.18-µm F-ZTAT Version)
Size Number
of types
Division ···
ratio
Rev. 3.00 Jul. 14, 2005 Page 805 of 986
REJ09B0098-0300