Renesas H8S/2100 Series Hardware Manual page 802

Section 24 Flash Memory
(b) Device Selection
The boot program will set the supported device to the specified device code. The program will
return the selected device code in response to the inquiry after this setting has been made.
Command H'10
• Command, H'10, (one byte): Device selection
• Size (one byte): Amount of device-code data
This is fixed at 4
• 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
Rev. 1.00 May 09, 2008 Page 776 of 954
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Size Device code
ERROR
Size Number of modes
SUM
...
Mode SUM