SH7280 Datasheet, PDF (1492/1726 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

Section 26 Flash Memory
• Number of multipliers (1 byte): The number of selectable frequency multipliers and divisors
for the device.
This is normally 2, which indicates the main operating frequency and the operating frequency
of the peripheral modules.
• Multiplier 1 (1 byte): Multiplier or divisor for the main operating frequency
Multiplier: Numerical value of the frequency multiplier (e.g. H'04 for ×4)
Divisor: Two’s complement negative numerical value in the case of frequency division (e.g.
H'FE [-2] for ×1/2)
• Multiplier 2 (1 byte): Multiplier or divisor for the peripheral operating frequency
Multiplier: Numerical value of the frequency multiplier (e.g. H'04 for ×4)
Divisor: Two’s complement negative numerical value in the case of frequency division (e.g.
H'FE [-2] for ×1/2)
• SUM (1 byte): Checksum
Response
H'06
• Response H'06 (1 byte): Response to the new-bit-rate selection command
This is the ACK code and is returned if the specified bit rate is selected.
Error
response
H'BF
ERROR
• Error response H'BF (1 byte): Error response to the new-bit-rate selection command
• ERROR (1 byte): Error code
H'11: Sum-check error
H'24: Bit rate selection error (the specified bit rate is not selectable).
H'25: Input frequency error (the specified input frequency is not within the range from the
minimum to the maximum value).
H'26: Frequency multiplier error (the specified multiplier does not match an available one).
H'27: Operating frequency error (the specified operating frequency is not within the range
from the minimum to the maximum value).
Rev. 1.00 Jun. 26, 2008 Page 1462 of 1692
REJ09B0393-0100