r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 1097

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

(4)
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 21.8 Inquiry and Selection Commands
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.
Command
H'20
H'10
H'21
H'11
H'22
H'23
H'25
H'26
H'27
H'3F
H'40
H'4F
Inquiry/Selection State
Command Name
Supported Device Inquiry
Device Selection
Clock Mode Inquiry
Clock Mode Selection
Multiplication Ratio Inquiry
Operating Clock Frequency
Inquiry
User MAT Information Inquiry
Block for Erasing Information
Inquiry
Programming Unit Inquiry
New Bit Rate Selection
Transition to
Programming/Erasing State
Boot Program Status Inquiry
Inquiry regarding device codes and product
name
Selection of device code
Inquiry regarding numbers of clock modes and
values of each mode
Inquiry regarding the number of frequency-
multiplied clock types, the number of
multiplication ratios, and the values of each
multiple
Inquiry regarding the maximum and minimum
values of the main clock and peripheral clocks
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 unit of programming data
Selection of new bit rate
Erasing of user MAT and entry to
programming/erasing state
Inquiry regarding the operated status of the
boot program
Description
Indication of the selected clock mode
Rev. 1.00 Sep. 19, 2008 Page 1069 of 1270
Section 21 Flash Memory
REJ09B0466-0100