SH7080_09 Datasheet, PDF (1360/1622 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family

Section 23 Flash Memory
• Command Error
Command errors are generated by undefined commands, commands sent in an incorrect order, and
the inability to accept a command. For example, sending the clock-mode selection command
before device selection or an inquiry command after the transition-to-programming/erasure state
command generates a command error.
Error
response
H'80
H'xx
⎯ Error response H'80 (1 byte): Command error
⎯ Command H'xx (1 byte): Received command
• Order of Commands
In the inquiry-and-selection state, commands should be sent in the following order.
1. Send the inquiry on supported devices command (H'20) to get the list of supported devices.
2. Select a device from the returned device information, and send the device selection command
(H'10) to select that device.
3. Send the inquiry on clock mode command (H'21) to get the available clock modes.
4. Select a clock mode from among the returned clock modes, and send the clock-mode selection
command (H'11).
5. After selection of the device and clock mode, send the commands to inquire about frequency
multipliers (H'22) and operating frequencies (H'23) to get the information required to select a
new bit rate.
6. Taking into account the returned information on the frequency multipliers and operating
frequencies, send a new-bit-rate selection command (H'3F).
7. After the device and clock mode have been selected, get the information required for
programming and erasure of the user boot MAT and user MAT by sending the commands to
inquire about the user boot MAT (H'24), user MAT (H'25), erasure block (H'26), and
programming size (H'27).
8. After making all necessary inquiries and the new bit rate selection, send the transition-to-
programming/erasure state command (H'40) to place the boot program in the
programming/erasure state.
Rev. 4.00 Dec. 15, 2009 Page 1300 of 1558
REJ09B0181-0400