r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 987

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

(10) Inquiry on programming size
In response to the inquiry on programming size, the boot program returns the size, in bytes, of the
unit for programming.
(11) New bit rate selection
In response to the new-bit-rate selection command, the boot program changes the bit rate setting to
the new bit rate and, if the setting was successful, responds to the ACK sent by the host by
returning another ACK at the new bit rate.
The new-bit-rate selection command should be sent after clock-mode selection.
Command
Response
Command
 Command H'27 (1 byte): Inquiry on programming size
 Response H'37 (1 byte): Response to the inquiry on programming size
 Size (1 byte): The number of characters in the programming size field (fixed at 2)
 Programming size (2 bytes): The size of the unit for programming
 SUM (1 byte): Checksum
 Command H'3F (1 byte): New bit rate selection
 Size (1 byte): The total length of the bit rate, input frequency, number of multipliers, and
 Bit rate (2 bytes): New bit rate
 Input frequency (2 bytes): The frequency of the clock signal fed to the boot program
This is the unit for the reception of data to be programmed.
multiplier fields
The bit rate value divided by 100 should be set here (for example, to select 19200 bps, the
set H'00C0, which is 192 in decimal notation).
This should be the frequency in MHz to the second decimal place, multiplied by 100 (for
example, if the frequency is 28.882 MHz, the values is truncated to the second decimal
place and multiplied by 100, making 2888; so H'0B48 should be set in this field).
H'27
H'37
H'3F
No. of multipliers
SUM
Multiplier 1
Size
Size
Programming size
Bit rate
Multiplier 2
Input frequency
Rev. 1.00 Sep. 21, 2007 Page 961 of 1124
SUM
Section 22 Flash Memory
REJ09B0402-0100