SH7147 Datasheet, PDF (904/1108 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 20 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 was selectable.
Error
response
H'BF
ERROR
⎯ Error response H'BF (1 byte): Error response to new bit rate selection
⎯ 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. 3.00 Oct. 06, 2008 Page 880 of 1080
REJ09B0230-0300