SII DPU-S445 SERIES, Техническое описание

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6-18
[2] State that some data is
registered.
Empty state
[1] Status immediately after
the factory shipment
Empty state
Data (1) In use state
[3] State that the data is
released.
Empty state
Data (1) Released state
[4] State that the registration and
release are repeated.
Empty state
Data (1) Released state
Data (2) In use state
Data (3) In use state
Data (4) Released state
Data (5) In use state
Data (6) Released state
[5] State that the "User Area Defragment"
command (DC2 '*' '1') is executed.
Empty state
Data (2) In use state
Data (3) In use state
Data (5) In use state
When the data is stored and released repeatedly, the shared area turns to the [4] state.
To use the “Released state (Erasable state)” area again, execute the User Area Defragment (DC2 '*' '1')
command.
The [5] shows the shared area after the command is executed.
Execute Remaining User Area Response (DC2 '*' '2') command to check the remaining capacity.
(2) Precautions on the user area of FLASH memory when rewriting, releasing, and allocating
The maximum rewritable number of the FLASH memory is approximately 100000 times. Execute the
User Area Defragment command after the remaining capacity of the FLASH memory is getting low to
make the most of the maximum rewritable number.
Do not turn the power off when executing a command which accompanies writing to or deleting from the
FLASH memory. If doing so may break the FLASH memory and it may not work. To confirm the FLASH
memory writing/erasing, send Execute Response Request (DC2 ‘j’) command (6.5.23 Status Commands)
behind the command as the above-mentioned and check response code.