SH7211 Datasheet, PDF (985/1228 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family

Section 21 Flash Memory
(j) 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.
Command H'27
• Command H'27 (1 byte): Inquiry on programming size
Response
H'37
Size
Programming size
SUM
• 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
This is the unit for the reception of data to be programmed.
• SUM (1 byte): Checksum
(k) 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
H'3F
Size
No. of multipliers Multiplier 1
SUM
Bit rate
Multiplier 2
Input frequency
• 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
multiplier fields
• Bit rate (2 bytes): New bit rate
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).
• Input frequency (2 bytes): The frequency of the clock signal fed to the boot program
This should be the frequency in MHz to the second decimal place, multiplied by 100 (for
example, if the frequency is 8.882 MHz, the value is truncated to the second decimal place and
multiplied by 100, making 888; so H'0378 should be set in this field).
Rev. 2.00 May. 08, 2008 Page 961 of 1200
REJ09B0344-0200