H8S2456 Datasheet, PDF (1173/1376 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8S Family / H8S/2400 Series

Section 22 Flash Memory
Error Response H'C0 H'51
• Error code, H'51, (one byte): Erasing error
An error occurred and erasure was not completed.
(7) 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
(8) 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, inquiries for the information of
programming/erasing to the user MAT should be made by 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.
Rev. 1.00 Sep. 19, 2008 Page 1143 of 1342
REJ09B0467-0100