h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 475

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

• 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
• Number of types (one byte): The number of supported multiplied clock types
• Number of multiplication ratios (one byte): The number of multiplication ratios for each type
• Multiplication ratio (one byte)
• SUM (one byte): Checksum
(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, (one byte): Inquiry regarding operating clock frequencies
• 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,
• Number of operating clock frequencies (one byte): The number of supported operating clock
Command
Response
multiplication ratios and the multiplication ratios
(e.g. when there are two multiplied clock types, which are the main and peripheral clocks, the
number of types will be H'02.)
(e.g. the number of multiplication ratios to which the main clock can be set and the peripheral
clock can be set.)
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.
and the number of frequencies.
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.)
H'23
H'33
Minimum value of operating
clock frequency
···
SUM
Size
Number of operating clock
frequencies
Maximum value of operating clock
frequency
Rev. 2.00, 03/04, page 443 of 534