p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 561
p2125vps20
Manufacturer Part Number
p2125vps20
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.P2125VPS20.pdf
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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 19.11.
Table 19.11 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 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.
Command
H'20
H'10
H'21
H'11
H'22
H'23
H'24
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
Division Ratio Inquiry
Operating Clock Frequency Inquiry Inquiry regarding the maximum and minimum
User Boot MAT Information Inquiry Inquiry regarding the number of user boot MATs
User MAT Information Inquiry
Erased Block Information Inquiry
Programming Unit Inquiry
New Bit Rate Selection
Transition to Programming/Erasing
State
Boot Program Status Inquiry
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
Section 19 Flash Memory (0.18-µm F-ZTAT Version)
Rev. 1.00 Sep. 21, 2006 Page 523 of 658
REJ09B0310-0100
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