H8SXSLASH1663M datasheet(1222/1504 Pages) RENESAS

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Section 25 Flash Memory

Rev. 2.00 Sep. 24, 2008 Page 1190 of 1468

REJ09B0412-0200

(7)

Command Order

The order for commands in the inquiry selection state is shown below.

1. A supported device inquiry (H'20) should be made to inquire about the supported devices.

2. The device should be selected from among those described by the returned information and set

with a device-selection (H'10) command.

3. A clock-mode inquiry (H'21) should be made to inquire about the supported clock modes.

4. The clock mode should be selected from among those described by the returned information

and set.

5. After selection of the device and clock mode, inquiries for other required information should

be made, such as the multiplication-ratio inquiry (H'22) or operating frequency inquiry (H'23),

which are needed for a new bit-rate selection.

6. A new bit rate should be selected with the new bit-rate selection (H'3F) command, according

to the returned information on multiplication ratios and operating frequencies.

7. After selection of the device and clock mode, the information of the user boot MAT and user

MAT should be made to inquire about the user boot MATs information inquiry (H'24), user

MATs information inquiry (H'25), erased block information inquiry (H'26), and programming

unit inquiry (H'27).

8. After making inquiries and selecting a new bit rate, issue the transition to

programming/erasing state command (H'40). The boot program will then enter the

programming/erasing state.

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