Renesas H8S/2437 Hardware Manual page 627

• Device code (four bytes): Device code (ASCII code) returned in response to the supported
device inquiry
• SUM (one byte): Checksum
Response H'06
• Response, H'06, (one byte): Response to the device selection command
ACK will be returned when the device code matches.
Error response H'90
• Error response, H'90, (one byte): Error response to the device selection command
ERROR : (one byte): Error code
H'11: Checksum error
H'21: Device code error, that is, the device code does not match
(c) Clock Mode Inquiry
The boot program will return the supported clock modes in response to the clock mode inquiry.
Command H'21
• Command, H'21, (one byte): Inquiry regarding clock mode
Response H'31
• Response, H'31, (one byte): Response to the clock-mode inquiry
• Size (one byte): Amount of data that represents the number of modes and modes
• Number of clock modes (one byte): The number of supported clock modes
H'00 indicates no clock mode or the device allows to read the clock mode.
• Mode (one byte): Values of the supported clock modes (i.e. H'01 means clock mode 1.)
• SUM (one byte): Checksum
(d) Clock Mode Selection
The boot program will set the specified clock mode. The program will return the selected clock-
mode information in response to the inquiry after this setting has been made.
The clock-mode selection command should be transmitted after the device-selection commands.
Command H'11
• Command, H'11, (one byte): Selection of clock mode
• Size (one byte): Amount of data that represents the modes. This is fixed to 1.
• Mode (one byte): A clock mode returned in response to the supported clock mode inquiry.
• SUM (one byte): Checksum
Response H'06
•
ERROR
Size Number of modes
Size Mode SUM
Mode ···
Rev. 1.00, 09/03, page 589 of 704
SUM