H8SXSLASH1663 datasheet(997/1158 Pages) RENESAS

997 / 1158 page

Section 21 Flash Memory (0.18-

µm F-ZTAT Version)

Rev.1.00 Jun. 07, 2006 Page 945 of 1102

REJ09B0294-0100

(6) Command Error

A command error will occur when a command is undefined, the order of commands is incorrect,

or a command is unacceptable. Issuing a clock-mode selection command before a device selection

or an inquiry command after the transition to programming/erasing state command, are examples.

Error Response

H'80

H'xx

• Error response, H'80, (one byte): Command error

• Command, H'xx, (one byte): Received command

(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 MAT should be made

to inquire about the 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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