3069RF-ZTAT Datasheet, PDF (680/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

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 18.26 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
response H'C0
H'51
 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. 5.0, 09/04, page 658 of 978