AN332 Datasheet, PDF (8/302 Pages) Silicon Laboratories – Si47XX PROGRAMMING GUIDE

AN332
Table 5. FM Transmitter Property Summary
Prop
0x0001
0x0101
0x0103
0x0201
0x0202
0x2100
0x2101
0x2102
0x2103
0x2104
0x2105
0x2106
0x2107
Name
GPO_IEN
DIGITAL_INPUT _FORMAT¹
DIGITAL_INPUT _SAMPLE_RATE¹
REFCLK_FREQ
REFCLK_PRESCALE
TX_COMPONENT_ENABLE
TX_AUDIO_DEVIATION
TX_PILOT_DEVIATION
TX_RDS_DEVIATION²
TX_LINE_INPUT_LEVEL
TX_LINE_INPUT_MUTE
TX_PREEMPHASIS
TX_PILOT_FREQUENCY
Description
Enables interrupt sources.
Configures the digital input format.
Configures the digital input sample
rate in 1 Hz steps.
Default is 0.
Sets frequency of the reference clock
in Hz. The range is 31130 to
34406 Hz, or 0 to disable the AFC.
Default is 32768 Hz.
Sets the prescaler value for the refer-
ence clock.
Enable transmit multiplex signal com-
ponents.
Default has pilot and L-R enabled.
Configures audio frequency deviation
level. Units are in 10 Hz increments.
Default is 6825 (68.25 kHz).
Configures pilot tone frequency devi-
ation level. Units are in 10 Hz incre-
ments. Default is 675 (6.75 kHz)
Configures the RDS/RBDS fre-
quency deviation level. Units are in
10 Hz increments. Default is 2 kHz.
Configures maximum analog line
input level to the LIN/RIN pins to
reach the maximum deviation level
programmed into the audio deviation
property TX Audio Deviation. Default
is 636 mV_PK.
Sets line input mute. L and R inputs
may be independently muted. Default
is not muted.
Configures pre-emphasis time con-
stant.
Default is 0 (75 µs).
Configures the frequency of the ste-
reo pilot. Default is 19000 Hz.
Default
0x0000
0x0000
0x0000
0x8000
0x0001
0x0003
0x1AA9
0x02A3
0x00C8
0x327C
0x0000
0x0000
0x4A38
Available In
All
All except
Si4710-A10
All except
Si4710-A10
All
All
All
All
All
Si4711/13/21
All
All
All
All
Notes:
1. Digital Audio Input feature (property DIGITAL_INPUT_FORMAT and DIGITAL_INPUT_SAMPLE_RATE) is supported
in FMTX component 2.0 or later.
2. RDS feature (command TX_RDS_BUFF, TX_RDS_PS and RDS properties 0x2103, 0x2C00 through 2C07) is
supported in FMTX component 2.0 or later.
3. Limiter feature (LIMITEN bit in TX_ACOMP_ENABLE and property TX_LIMITER_RELEASE_TIME) is supported in
FMTX component 2.0 or later.
8
Rev. 1.0