r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 1170

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 22 Flash Memory
• Multiplication ratio 1 (one byte): The value of multiplication or division ratios for the main
• Multiplication ratio 2 (one byte): The value of multiplication or division ratios for the
• SUM (one byte): Checksum
• Response, H'06, (one byte): Response to selection of a new bit rate
• Error response, H'BF, (one byte): Error response to selection of new bit rate
• ERROR: (one byte): Error code
Rev. 1.00 Sep. 19, 2008 Page 1140 of 1342
REJ09B0467-0100
Response
Error Response
operating frequency
Multiplication ratio (one byte): The value of the multiplication ratio (e.g. when the clock
frequency is multiplied by four, the multiplication ratio will be H'04.)
Division ratio: The inverse of the division ratio, as a negative number (e.g. when the clock
frequency is divided by two, the value of division ratio will be H'FE. H'FE = [-2])
peripheral frequency
Multiplication ratio (one byte): The value of the multiplication ratio (e.g. when the clock
frequency is multiplied by four, the multiplication ratio will be H'04.)
(Division ratio: The inverse of the division ratio, as a negative number (e.g. when the clock is
divided by two, the value of division ratio will be H'FE. H'FE = [-2])
When it is possible to set the bit rate, the response will be ACK.
H'11: Checksum error
H'24: Bit-rate selection error
H'25: Error in input frequency
H'26: Multiplication-ratio error
H'27: Operating frequency error
H'06
The rate is not available.
This input frequency is not within the specified range.
The ratio does not match an available ratio.
The frequency is not within the specified range.
H'BF
ERROR