Datasheet

Section 7 ROM
REJ09B0465-0300 Rev. 3.00 Page 183 of 982
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group
• Response H'31 (1 byte): Response to a clock mode inquiry command
• Size (1 byte): The total size of the mode fields
• Mode (1 byte): Selectable clock modes (example: H'00 denotes clock mode)
• SUM (1 byte): Checksum
(d) Clock Mode Selection
In response to a clock mode selection command, the boot program sets the specified clock mode
as the selected clock mode. The boot program will return the information on the selected clock
mode in response to the subsequent inquiries.
The clock-mode selection command should be transmitted after the device selection command
(H'10).
Command H'11 Size Mode SUM
• Command H'11 (1 byte): Clock mode selection
• Size (1 byte): The number of characters in the mode field (fixed to one).
• Mode (1 byte): The clock mode that has been returned in response to a clock mode inquiry
command.
• SUM (1 byte): Checksum
Response H'06
• Response H'06 (1 byte): Response to a clock mode selection command
The ACK code is returned when the specified clock mode corresponds to one of the selectable
clock modes.
Error response
H'91 ERROR
• Error response H'91 (1 byte): Error response to a clock mode selection command
• ERROR (1 byte): Error code
H'11: Checksum error
H'22: Clock mode error indicating clock mode disagreement
Even if value H'00 or H'01 has been returned in response to the clock-mode inquiry command as
the number of modes, it is required to select the clock mode for each value.