ML22Q533 datasheet(113/178 Pages) ROHM

113 / 178 page

FEDL22Q53X-02

ML22Q53X

 FDIRECT command

・ Command

1st byte

PRT7

PRT6

PRT5

PRT4

PRT3

PRT2

PRT1

PRT0

2nd byte

The FDIRECT command controls accesses to the flash memory using the clock synchronous serial interface.

Input the command after inputting the PUP command.

If the protection code of the flash memory area is not 0x69 and the protection codes (PRT7 to PRT0) entered in the second

byte match the protection code set when creating sound data, the flash memory access mode is entered. After that, the flash

memory can be accessed using the clock synchronous serial interface.

If the protection code set when creating sound data is 0x69, the flash memory does not change to flash memory access mode

even if the code matches.

To cancel the flash memory access mode, insert a reset (RESETB = "L") and conduct initialization or turn off the power

supply.

Do not enter this command because this command is ignored when this command is entered from the I

2C interface.

For the protection codes of the flash memory area, refer to the "Speech LSI Utility Setting Items".

For the timing of the FDIRECT command, refer to the "FDIRECT command timing" in the timing chart.

113/178

ML22Q533 Datasheet(PDF) 113 Page - Rohm