Rev. 5.00, 12/03, page 698 of 1088
State Transition: The overview of the state transition after boot mode is initiated is shown in
figure 17-67. For details on boot mode, refer to section 17.29.1, Serial Communications Interface
Specification for Boot Mode.
[1] Bit rate adjustment
After boot mode is initiated, the bit rate of the SCI interface is adjusted with that of the host.
[2] Waiting for inquiry set command
For inquiries about user-MAT size and configuration, MAT start address, and support state, the
required information is transmitted to the host.
[3] Automatic erasure of all user MAT and user boot MAT
After inquiries have finished, all user MAT and user boot MAT are automatically erased.
[4] Waiting for programming/erasing command
•
When the program preparation notice is received, the state for waiting program data is
entered. The programming start address and program data must be transmitted following
the programming command. When programming is finished, the programming start address
must be set to H'FFFFFFFF and transmitted. Then the state for waiting program data is
returned to the state of programming/erasing command wait.
•
When the erasure preparation notice is received, the state for waiting erase-block data is
entered. The erase-block number must be transmitted following the erasing command.
When the erasure is finished, the erase-block number must be set to H'FF and transmitted.
Then the state for waiting erase-block data is returned to the state for waiting
programming/erasing command. The erasure must be executed when reset start is not
executed and the specified block is programmed after programming is executed in boot
mode. When programming can be executed by only one operation, all blocks are erased
before the state for waiting programming/erasing/other command is entered. The erasing
operation is not required.
•
There are many commands other than programming/erasing. Examples are sum check,
blank check (erasure check), and memory read of the user MAT/user boot MAT and
acquisition of current status information.
Note that memory read of the user MAT/user boot MAT can only read the program data after all
user MAT/user boot MAT has automatically been erased.
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