r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 1102

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 21 Flash Memory
(f)
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
• Minimum value of operating clock frequency (two bytes): The minimum value of the
• Maximum value (two bytes): Maximum value of the multiplied or divided clock frequencies.
• SUM (one byte): Checksum
Rev. 1.00 Sep. 19, 2008 Page 1074 of 1270
REJ09B0466-0100
Command
Response
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.)
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 64 MHz, it will be 6400 and H'1900).
There are as many pairs of minimum and maximum values as there are operating clock
frequency.
Operating Clock Frequency Inquiry
H'23
H'33
Minimum value of operating
clock frequency
···
SUM
Size
Number of operating clock
frequencies
Maximum value of operating clock
frequency