SI4827-A10 Datasheet, PDF (17/25 Pages) Silicon Laboratories – BROADCAST ANALOG TUNING DIGITAL DISPLAY AM/FM/SW RADIO RECEIVER

Si4827-A10
Table 13. Si4827-A10 AM/SW 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 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 Si4827 has its own power up and get status commands which are 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 14. Si4827-A10 AM/SW Receiver Property Summary
Prop
0x0201
0x0202
0x4000
0x4001
0x4002
0x4003
0x3300
0x3301
0x3302
0x3303
Name
Description
REFCLK_FREQ
Sets frequency of reference clock in Hz.
The range is 31130 to 34406 Hz, or 0 to disable the AFC.
Default is 32768 Hz.
REFCLK_PRESCALE Sets the prescaler value for RCLK input.
RX_VOLUME
Sets the output volume.
RX_HARD_MUTE
Mutes the audio output. L and R audio outputs may be muted
independently.
RX_BASS_TREBLE Sets the output bass/treble level.
RX_ACTUAL_VOLUME Read the actual output volume.
AM_SOFT_MUTE_RATE Sets the attack and decay rates when entering and leaving
soft mute.
AM_SOFT_MUTE_SLOPE Configures attenuation slope during soft mute in dB attenua-
tion per dB SNR below the soft mute SNR threshold.
AM_SOFT_MUTE_
MAX_ATTENUATION
Sets maximum attenuation during soft mute (dB). Set to 0 to
disable soft mute.
AM_SOFT_MUTE_
SNR_THRESHOLD
Sets SNR threshold to engage soft mute.
Default
0x8000
0x0001
0x003F
0x0000
0x0003
0x003F
0x0040
0x0002.,
0x0010
0x0008
Rev. 1.0
17