Datasheet

Section 7 ROM
Page 188 of 982 REJ09B0465-0300 Rev. 3.00
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group
(j) Data Flash Inquiry
In response to a data flash inquiry command, the boot program returns an indicator of whether or
not data-flash memory is present.
Command H'2A
• Command H'2A (1 byte): Data flash inquiry
Response H'3A Size Presence SUM
• Response H'3A (1 byte): Response to a data flash inquiry command
• Size (1 byte): The number of characters in the presence field (fixed to 1)
• Presence (1 bytes): Presence of data flash
H'00: Data flash is not present.
H'01: Data flash is present.
• SUM (1 byte): Checksum value that makes the sum of the bytes from the command to the
SUM byte become H'00.
(k) Data Flash Information Inquiry
In response to a data flash information inquiry command, the boot program returns the number of
data flash areas and their addresses.
Command H'2B
• Command H'2B (1 byte): Data flash information inquiry
Response H'3B Size Number of
areas
Start address of an area End address of an area
…
SUM
• Response H'3B (1 byte): Response to a data flash information inquiry command
• Size (1 byte): The total size of the fields for the number of areas, start addresses of areas, and
end addresses of areas.