Silicon Laboratories Si4704 Series Programming Manual page 7

Prop Name
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
0x2200 TX_ACOMP_ENABLE
0x2201 TX_ACOMP_THRESHOLD
0x2202 TX_ACOMP_ATTACK_TIME
0x2203 TX_ACOMP_RELEASE_TIME
Notes:
1. Digital Audio Input feature (property DIGITAL_INPUT_FORMAT and DIGITAL_INPUT_SAMPLE_RATE) is
supported in FMTX component 2.0 or higher.
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 higher.
3. Limiter feature (LIMITEN bit in TX_ACOMP_ENABLE and property TX_LIMITER_RELEASE_TIME) is
supported in FMTX component 2.0 or higher.
Table 5. FM Transmitter Property Summary
Enables interrupt sources.
1
Configures the digital input format.
Configures the digital input sample rate in 1 Hz steps.
1
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 reference clock.
Enable transmit multiplex signal components.
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 deviation level. Units
are in 10 Hz increments. Default is 675 (6.75 kHz)
Si4711/13/21 Only. 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 indepen-
dently muted. Default is not muted.
Configures pre-emphasis time constant.
Default is 0 (75 µS).
Configures the frequency of the stereo pilot. Default is
19000 Hz.
Enables audio dynamic range control and limiter.
3
Default is 2 (limiter is enabled, audio dynamic range
control is disabled).
Sets the threshold level for audio dynamic range con-
trol.
Default is –40 dB.
Sets the attack time for audio dynamic range control.
Default is 0 (0.5 ms).
Sets the release time for audio dynamic range control.
Default is 4 (1000 ms).
Confidential Rev. 0.2
Description
.
PK
AN332
Default
0x0000
0x0000
0x0000
0x8000
0x0001
0x0003
0x1AA9
0x02A3
0x00C8
0x327C
0x0000
0x0000
0x4A38
0x0002
0xFFD8
0x0000
0x0004
7