SI4822-A10 Datasheet, PDF (16/24 Pages) Silicon Laboratories – BROADCAST ANALOG TUNING DIGITAL DISPLAY AM/FM/SW RADIO RECEIVER

Si4822/26-A10
5. Commands and Properties
Table 11. Si4822/26-A10 FM Receiver Command Summary
Cmd
Name
Description
0xE0
ATDD_GET_STATUS Get tune freq, band and etc status of the device
0xE1
ATDD_POWER_UP
Power up device, band selection and band properties setup
0xE2
ATDD_AUDIO_MODE Audio output mode: get/set audio mode and settings
0x10
GET_REV
Returns the revision information of the device.
0x11
POWER_DOWN
Power down device.
0x12
SET_PROPERTY
Sets the value of a property.
0x13
GET_PROPERTY
Retrieve a property's value.
Note: The Si4822/26 has its own power up and get status commands which is different from previous si47xx tuner parts. To
differentiate, we use “ATDD_POWER_UP” and ATDD_GET_STATUS to denote the ATDD specific commands instead
of the general si47xx “POWER_UP” and “STATUS” commands
Table 12. Si4822/26-A10 FM Receiver Property Summary
Prop
0x1100
0x1300
0x1301
0x1302
0x1303
0x4000
0x4001
0x4002
0x4003
Name
Description
Default
FM_DEEMPHASIS
Sets deemphasis time constant. Default is 75 μs.
0x0002
FM_SOFT_MUTE_RATE Sets the attack and decay rates when entering and leaving 0x0040
soft mute.
FM_SOFT_MUTE_SLOPE Configures attenuation slope during soft mute in dB attenua- 0x0002
tion per dB SNR below the soft mute SNR threshold. Default
value is 2.
FM_SOFT_MUTE_
MAX_ATTENUATION
Sets maximum attenuation during soft mute (dB). Set to 0 to 0x0010
disable soft mute. Default is 16 dB.
FM_SOFT_MUTE_
SNR_THRESHOLD
Sets SNR threshold to engage soft mute. Default is 4 dB.
0x0004
RX_VOLUME
Sets the output volume.
0x003F
RX_HARD_MUTE
Mutes the audio output.
0x0000
RX_BASS_TREBLE
Sets the output bass/treble level
0x0004
RX_ACTUAL_VOLUME Read the actual output volume
0x003F
16
Rev.1.0