Datasheet

Section 20 Flash Memory (0.18-μm F-ZTAT Version)
Rev.6.00 Mar. 18, 2009 Page 790 of 980
REJ09B0050-0600
(e) Multiplication Ratio Inquiry
The boot program will return the supported multiplication and division ratios.
Command H'22
• Command, H'22, (one byte): Inquiry regarding multiplication ratio
Response H'32 Size Number
of types
Number of
multiplication ratios
Multiplica-
tion ratio
···
···
SUM
• Response, H'32, (one byte): Response to the multiplication ratio inquiry
• Size (one byte): The amount of data that represents the number of clock sources and
multiplication ratios and the multiplication ratios
• Number of types (one byte): The number of supported multiplied clock types
(e.g. when there are two multiplied clock types, which are the main and peripheral clocks, the
number of types will be H'02.)
• Number of multiplication ratios (one byte): The number of multiplication ratios for each type
(e.g. the number of multiplication ratios to which the main clock can be set and the peripheral
clock can be set.)
• Multiplication ratio (one byte)
Multiplication ratio: The value of the multiplication ratio (e.g. when the clock-frequency
multiplier is four, the value of multiplication ratio will be H'04.)
Division ratio: Not supported by the H8S/2368F 0.18 μm F-ZTAT Group.
The number of multiplication ratios returned is the same as the number of multiplication ratios
and as many groups of data are returned as there are types.
• SUM (one byte): Checksum