TMP86FS49AIUG datasheet(243/296 Pages) TOSHIBA

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TMP86FS49AIUG

It takes a maximum of 40

µs to set read protection in the flash memory. The next command sequence cannot

be executed until this operation is completed. To check the completion of the read protect operation, perform

read operations repeatedly for data polling until the same data is read twice from the same address in the flash

memory. During the read protect operation, any attempts to read from the same address is reversed bit 6 of the

data (toggling between 0 and 1).

19.3 Toggle Bit (D6)

After the byte program, chip erase, and read protect command sequence is executed, any consecutive attempts to

read from the same address is reversed bit 6 (D6) of the data (toggling between 0 and 1) until the operation is com-

pleted. Therefore, this toggle bit provides a software mechanism to check the completion of each operation. Usually

perform read operations repeatedly for data polling until the same data is read twice from the same address in the

flash memory. After the byte program, chip erase, or read protect command sequence is executed, the initial read of

the toggle bit always produces a "1".

TMP86FS49AIUG Arkusz danych(PDF) 243 Page - Toshiba Semiconductor