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SI4744 数据表(PDF) 8 Page - Silicon Laboratories

部件名 SI4744
功能描述  Si47XX PROGRAMMING GUIDE
Download  302 Pages
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制造商  SILABS [Silicon Laboratories]
网页  http://www.silabs.com
标志 SILABS - Silicon Laboratories

SI4744 数据表(HTML) 8 Page - Silicon Laboratories

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AN332
8
Rev. 1.0
Table 5. FM Transmitter Property Summary
Prop
Name
Description
Default
Available In
0x0001
GPO_IEN
Enables interrupt sources.
0x0000
All
0x0101
DIGITAL_INPUT _FORMAT1
Configures the digital input format.
0x0000
All except
Si4710-A10
0x0103
DIGITAL_INPUT _SAMPLE_RATE1
Configures the digital input sample
rate in 1 Hz steps.
Default is 0.
0x0000
All except
Si4710-A10
0x0201
REFCLK_FREQ
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.
0x8000
All
0x0202
REFCLK_PRESCALE
Sets the prescaler value for the refer-
ence clock.
0x0001
All
0x2100
TX_COMPONENT_ENABLE
Enable transmit multiplex signal com-
ponents.
Default has pilot and L-R enabled.
0x0003
All
0x2101
TX_AUDIO_DEVIATION
Configures audio frequency deviation
level. Units are in 10 Hz increments.
Default is 6825 (68.25 kHz).
0x1AA9
All
0x2102
TX_PILOT_DEVIATION
Configures pilot tone frequency devi-
ation level. Units are in 10 Hz incre-
ments. Default is 675 (6.75 kHz)
0x02A3
All
0x2103
TX_RDS_DEVIATION2
Configures the RDS/RBDS fre-
quency deviation level. Units are in
10 Hz increments. Default is 2 kHz.
0x00C8 Si4711/13/21
0x2104
TX_LINE_INPUT_LEVEL
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 mVPK.
0x327C
All
0x2105
TX_LINE_INPUT_MUTE
Sets line input mute. L and R inputs
may be independently muted. Default
is not muted.
0x0000
All
0x2106
TX_PREEMPHASIS
Configures pre-emphasis time con-
stant.
Default is 0 (75 µs).
0x0000
All
0x2107
TX_PILOT_FREQUENCY
Configures the frequency of the ste-
reo pilot. Default is 19000 Hz.
0x4A38
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.


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