Renesas H8S/2318 series, Hardware Manual

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Rev. 5.00, 12/03, page 738 of 1088
Error
Response H'91 ERROR
•
Error response, H'91, (1 byte): Error response to the clock mode selection command
•
ERROR, (1 byte) : Error code
H'11: Checksum error
H'22: Clock mode error, that is, the clock mode does not match.
Even when the clock mode value is H'00 or H'01 for clock mode inquiry, clock mode selection
is performed for each value.
(5) Multiplication Ratio-Inquiry
The boot program will return the supported multiplication and division ratios.
Command H'22
•
Command, H'22, (1 byte): Inquiry regarding multiplication ratio
Response H'32 Size The
Num
ber of
Clock
The number of
multiplication ratios Multiplica-
tion ratio ···
···
SUM
•
Response, H'32, (1 byte): Response to the multiplication ratio inquiry
•
Size (1 byte): The amount of data that represents the clock sources, the number of
multiplication ratios, and the multiplication ratios
•
A number of types (1 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.)
•
A number of multiplication ratios (1 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 (1 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: The inverse of the division ratio, i.e. a negative number (e.g. when the clock
is divided by two, the value of division ratio will be H'FE. H'FE = D'-2)
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 (1 byte): Checksum