R5F72115D160FPV datasheet(985/1228 Pages) RENESAS

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Section 21 Flash Memory

Rev. 2.00 May. 08, 2008 Page 961 of 1200

REJ09B0344-0200

(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

Bit rate

Input frequency

No. of multipliers

Multiplier 1

Multiplier 2

SUM

• 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).

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