Renesas H8S/2318 series, Hardware Manual

Page: 765 / 1121

Rev. 5.00, 12/03, page 735 of 1088
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.
Inquiry and selection commands are listed below.
Table 17-61 Inquiry and Selection Commands
Command Command Name Description
H'20 Supported Device Inquiry Inquiry regarding device codes and product
names of F-ZTAT
H'10 Device Selection Selection of device code
H'21 Clock Mode Inquiry Inquiry regarding numbers of clock modes and
values of each mode
H'11 Clock Mode Selection Indication of the selected clock mode
H'22 Multiplication Ratio Inquiry Inquiry regarding the number of frequency-
multiplied clock types, the number of
multiplication ratios, and the values of each
multiple
H'23 Operating Clock Frequency
Inquiry Inquiry regarding the maximum and minimum
values of the main clock and peripheral clocks
H'24 User Boot MAT Information
Inquiry Inquiry regarding the number of user boot MATs
and the start and last addresses of each MAT
H'25 User MAT Information Inquiry Inquiry regarding the a number of user MATs
and the start and last addresses of each MAT
H'26 Block for Erasing Information
Inquiry Inquiry regarding the number of blocks and the
start and last addresses of each block
H'27 Programming Unit Inquiry Inquiry regarding the unit of programming data
H'3F New Bit Rate Selection Selection of new bit rate
H'40 Transition to
Programming/erasing State Erasing of user MAT and user boot MAT, and
entry to programming/erasing state
H'4F Boot Program Status Inquiry Inquiry into the operated status of the boot
program
The selection commands, which are device selection (H'10), clock mode selection (H'11), and new
bit rate selection (H'3F), should be sent from the host in that order. These commands will
certainly be needed. When two or more selection commands are sent at once, the last command
will be valid.
All of these commands, except for the boot program status inquiry command (H'4F), will be valid
until the boot program receives the programming/erasing transition (H'40). The host can choose