D12320VF25V Datasheet, PDF (802/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 17 ROM
Host
Waiting for one-bit period
at the specified bit rate
Setting a new bit rate
H'06 (ACK)
Boot program
Setting a new bit rate
H'06 (ACK) with the new bit rate
H'06 (ACK) with the new bit rate
Setting a new bit rate
Figure 17.85 New Bit-Rate Selection Sequence
Transition to Programming/Erasing State
The boot program will transfer the erasing program, and erase the user MATs and user boot MATs
in that order. On completion of this erasure, ACK will be returned and will enter the
programming/erasing state.
The host should select the device code, clock mode, and new bit rate with device selection, clock-
mode selection, and new bit-rate selection commands, and then send the command for the
transition to programming/erasing state. These procedure should be carried out before sending of
the programming selection command or program data.
Command H'40
• Command, H'40, (1 byte): Transition to programming/erasing state
Response H'06
• Response, H'06, (1 byte): Response to transition to programming/erasing state
The boot program will send ACK when the user MAT and user boot MAT have been erased
by the transferred erasing program.
Error
H'C0 H'51
Response
• Error response, H'C0, (1 byte): Error response for user boot MAT blank check
• Error code, H'51, (1 byte): Erasing error
An error occurred and erasure was not completed.
Rev.7.00 Feb. 14, 2007 page 768 of 1108
REJ09B0089-0700