LV25700PM Datasheet, PDF (64/68 Pages) Sanyo Semicon Device – For Car Radio Single chip Tuner IC

Special Commands
LV25700PM
SA 248. Flash Write Mode Set ( 3 Bytes)
DATA2
ID2
DATA1
ID1
DATA0
ID0
This sets the flash memory write mode. Set arbitrary values other than 000000H or FFFFFFH in the 3 ID bytes. This
command sets the flash memory to write mode. Actual write to the flash memory is performed by transmitting
SA252 within 150ms after transmitting this command, and then executing write.
SA 249. RDS Mute ON
This mute command (DET OUT attenuation factor = 40dB) is used for AF search and other operations in RDS mode.
* This command consists of only a slave address and sub address, and there is no data.
SA 250. RDS Mute OFF
This command is used to set the above-noted RDS mute to OFF. RDS mute is automatically set to OFF during reset,
when switching the SA04 FM/AM bit, and when executing SA252 Flash Write.
* This command consists of only a slave address and sub address, and there is no data.
SA 251. Flash Default
This command reads the SA01 to SA95 data for the current band (FM or AM) from the LV25700 internal flash
memory. It is used to discard the adjustment data, or when performing verification after executing flash write by
SA252.
During reset the LV25700 automatically reads the FM data from the flash memory. In addition, when switching the
band, the LV25700 also automatically reads the FM data from the flash memory, so execution of this command is
not necessary in these cases.
* This command consists of only a slave address and sub address, and there is no data.
SA 252. Flash Write (3 Bytes)
DATA2
ID2
DATA1
ID1
DATA0
ID0
This command writes the SA01 to SA95 data in the flash memory. This command is used as a set together with
SA248 to prevent write errors. When this command is transmitted within 150ms after transmitting SA248 and the
IDs match, the SA01 to SA95 setting values for the current band (FM or AM) are written in the LV25700 internal
flash memory. This command should be executed after all the adjustment data is set and the SA95 checksum data is
transmitted.
Note that the FM and AM setting values are written in separate areas of the flash memory.
Set the inverse value of the ID transmitted by SA248 in the 3 ID bytes.
SA 253. Switching the Normal Frequency
This command switches the frequency and RF DAC value switched by SA254 to the normal (designated by SA1,
SA2 and SA5) frequency and RF DAC value.
* This command consists of only a slave address and sub address, and there is no data.
SA 254. Switching the AF Frequency
This command switches to the frequency and RF DAC value designated by SA80, SA81 and SA82.
* This command consists of only a slave address and sub address, and there is no data.
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