Table 21.11 Inquiry And Selection Commands - Renesas H8S Series Hardware Manual
16-bit single-chip microcomputer
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(4)
Inquiry/Selection State
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 in table 21.11.
Table 21.11 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 Inquiry regarding the maximum and minimum
H'24
User Boot MAT Information Inquiry Inquiry regarding the number of user boot MATs
H'25
User MAT Information Inquiry
H'26
Erased Block 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
The selection commands, which are device selection (H'10), clock mode selection (H'11), and new
bit rate selection (H'3F), should be transmitted from the host in that order. These commands are
needed in all cases. When two or more selection commands are transmitted at the same time, the
last command will be valid.
Section 21 Flash Memory (0.18-µm F-ZTAT Version)
Description
Inquiry regarding device code and product name
Selection of device code
Inquiry regarding number of clock modes and
values of each mode
Indication of the selected clock mode
Inquiry regarding the number of types of division
ratios, and the number and values of each ratio
type
values of the main clock and peripheral clock
and the start and last addresses of each MAT
Inquiry regarding the 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 size of program data
Selection of the new bit rate
Erasure of user MAT and user boot MAT, and
transition to programming/erasing state
Inquiry into the processing status of the boot
program
Rev. 3.00 Jul. 14, 2005 Page 801 of 986
REJ09B0098-0300
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