SH7280 Datasheet, PDF (1486/1726 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

Section 26 Flash Memory
(c) Inquiry on Clock Modes
In response to the inquiry on clock modes, the boot program returns the number of available clock
modes.
Command H'21
• Command H'21 (1 byte): Inquiry on clock modes
Response
H'31
Size
Mode
…
SUM
• Response H'31 (1 byte): Response to the inquiry on clock modes
• Size (1 byte): The total length of the number of modes and mode data fields
• Mode (1 byte): Selectable clock mode (example: H'01 = clock mode 1)
• SUM (1 byte): Checksum
(d) Clock-Mode Selection
In response to the clock-mode selection command, the boot program sets the specified clock
mode. The boot program will return the information on the selected clock mode in response to
subsequent inquiries.
Command H'11
Size
Mode
SUM
• Command H'11 (1 byte): Clock mode selection
• Size (1 byte): Number of characters in the clock-mode field (fixed at 1)
• Mode (1 byte): A clock mode returned in response to the inquiry on clock modes
• SUM (1 byte): Checksum
Response
H'06
• Response H'06 (1 byte): Response to clock mode selection
This is the ACK code and is returned when the specified clock-mode matches one of the
available clock modes.
Rev. 1.00 Jun. 26, 2008 Page 1456 of 1692
REJ09B0393-0100