Silicon Laboratories Si47 Series Programming Manual page 8

AN332
Prop
0x0001 GPO_IEN
0x0101 DIGITAL_INPUT _FORMAT
0x0103 DIGITAL_INPUT _SAMPLE_RATE
0x0201 REFCLK_FREQ
0x0202 REFCLK_PRESCALE
0x2100 TX_COMPONENT_ENABLE
0x2101 TX_AUDIO_DEVIATION
0x2102 TX_PILOT_DEVIATION
0x2103 TX_RDS_DEVIATION
0x2104 TX_LINE_INPUT_LEVEL
0x2105 TX_LINE_INPUT_MUTE
0x2106 TX_PREEMPHASIS
0x2107 TX_PILOT_FREQUENCY
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
Table 5. FM Transmitter Property Summary
Name
Enables interrupt sources.
1
Configures the digital input format.
Configures the digital input sample
1
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-
2
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
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.
Description
.
PK
Rev. 0.8
Available In
Default
0x0000 All
All except
0x0000
Si4710-A10
All except
0x0000
Si4710-A10
0x8000 All
0x0001 All
0x0003 All
0x1AA9 All
0x02A3 All
0x00C8 Si4711/13/21
0x327C All
0x0000 All
0x0000 All
0x4A38 All