Renesas H8S/2100 Series Hardware Manual page 800

Section 24 Flash Memory
(3) Inquiry and Selection States
The boot program returns information from the flash memory in response to the host's inquiry
commands and sets the device code, clock mode, and bit rate in response to the host's selection
command.
Table 24.17 lists the inquiry and selection commands.
Table 24.17 Inquiry and Selection Commands
Command Command Name
H'20 Supported device inquiry
H'10 Device selection
H'21 Clock mode inquiry
H'11 Clock mode selection
H'22 Division ratio inquiry
H'23 Operating clock frequency
inquiry
H'24 User boot MAT information
inquiry
H'25 User MAT information inquiry
H'26 Block for erasing information
Inquiry
H'27 Programming unit inquiry
H'3F New bit rate selection
H'40 Transition to
programming/erasing state
H'4F Boot program status inquiry
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Description
Inquiry regarding device codes
Selection of device code
Inquiry regarding numbers of clock modes and
values of each mode
Indication of the selected clock mode
Inquiry regarding the number of frequency-divided
clock types, the number of division ratios and the
values of each division
Inquiry regarding the maximum and minimum
values of the main clock and peripheral clocks
Inquiry regarding the a number of user boot MATs
and the start and last addresses of each MAT
Inquiry regarding the a number of user MATs and
the start and last addresses of each MAT
Inquiry regarding the number of blocks and the start
and last addresses of each block
Inquiry regarding the unit of program data
Selection of new bit rate
Erasing of user MATs or user boot MATs, and entry
to programming/erasing state
Inquiry into the operated status of the boot program