h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 478

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

(j) Programming Unit Inquiry
The boot program will return the programming unit used to program data.
• Command, H'27, (one byte): Inquiry regarding programming unit
• Response, H'37, (one byte): Response to programming unit inquiry
• Size (one byte): The number of bytes that indicate the programming unit, which is fixed to 2
• Programming unit (two bytes): A unit for programming
• SUM (one byte): Checksum
(k) New Bit-Rate Selection
The boot program will set a new bit rate and return the new bit rate.
This selection should be sent after sending the clock mode selection command.
• Command, H'3F, (one byte): Selection of new bit rate
• Size (one byte): The number of bytes that represents the bit rate, input frequency, number of
• Bit rate (two bytes): New bit rate
• Input frequency (two bytes): Frequency of the clock input to the boot program
• Number of multiplication ratios (one byte): The number of multiplication ratios to which the
• Multiplication ratio 1 (one byte): The value of multiplication or division ratios for the main
Rev. 2.00, 03/04, page 446 of 534
Command
Response
Command
This is the unit for reception of programming.
multiplication ratios, and multiplication ratio
One hundredth of the value (e.g. when the value is 19200 bps, it will be 192, which is H'00C0.)
This is valid to the hundredths place and represents the value in MHz multiplied by 100. (E.g.
when the value is 20.00 MHz, it will be 2000, which is H'07D0.)
device can be set.
operating frequency
Multiplication ratio (one byte): The value of the multiplication ratio (e.g. when the clock
frequency is multiplied by four, the multiplication ratio will be H'04.)
Division ratio: The inverse of the division ratio, as a negative number (e.g. when the clock
frequency is divided by two, the value of division ratio will be H'FE. H'FE = D'-2)
H'27
H'37
H'3F
Number of
multiplication ratios
SUM
Size
Programming unit
Size
Multiplication
ratio 1
SUM
Bit rate
Multiplication
ratio 2
Input frequency